Modern Firearms: Pistols, Rifles and Shotguns Compared

Key Concepts

• Trigger systems: striker vs. hammer; single-action, double-action, or DA/SA affect trigger weight and consistency.
• Safeties: trigger/tab, grip safety, manual safety, and firing pin blocks mitigate negligent discharges.
• Ergonomics: grip size, bore axis, and sight radius impact recoil control and speed.
• Modern features: optics‑ready slides and accessory rails expand capability.

Defining Attributes

Firing Mechanism

Striker-Fired or Hammer-Fired

Frame Size

Full-Size, Compact, Subcompact, Micro-Compact

Common Calibers

9mm, .45 ACP, .40 S&W, 5.7x28mm

Practical Considerations

• High capacity (10-20+ rounds) & fast reloads
• Lighter trigger pulls & large aftermarket support
• More complex operation than revolvers
• Can be susceptible to user-induced malfunctions (limp-wristing)

Subcategories

Micro‑Compact Carry

Properties: 10–13‑rd, 3.0–3.3" barrel, very concealable; sharper recoil. Examples: SIG P365 family, Springfield Hellcat, Glock 43X MOS.

Compact Duty/Carry

Properties: 15–17‑rd, 3.9–4.1" barrel, balance of shootability and concealment. Examples: Glock 19, S&W M&P 2.0 Compact, SIG P320 Compact.

Full‑Size Duty/Competition

Properties: 17–20+ rd, 4.5–5" barrel, longest sight radius, lowest muzzle flip. Examples: Glock 17/34, CZ P‑10 F, Walther PDP, Staccato P.

Target/Competition

Properties: tuned triggers, match barrels, optics/comp ready; heavier for flat recoil. Examples: CZ Shadow 2, SIG P320 X5 Legion, 2011/1911 race guns.

Representative Models

• Glock 19 — 9mm, 15+1; balanced, do‑everything compact; best for: one‑gun duty/defense/carry versatility
• SIG Sauer P365 — 9mm, 10–17+1; micro‑compact CCW; best for: maximum concealment with modern capacity
• SIG Sauer P320 — 9mm, 17+1; modular FCU, duty/competition; best for: modular frames and competition builds
• 1911 Government — .45 ACP, 7–8+1; single‑action classic; best for: tuned single‑action triggers and heritage
• CZ 75 SP‑01 — 9mm, 18+1; steel frame, soft‑shooting; best for: range enjoyment and production‑style competition

Key Concepts

• Trigger modes: DA (long/heavier) vs. SA (short/light) determine precision vs. speed.
• Frame sizes: small (J‑frame), medium (K/L), large (N) affect capacity, recoil, and carry.
• Cylinder gap and barrel length influence velocity, blast, and sight radius.
• Loading aids: speed strips/loaders and moon clips dramatically speed reloads.

Defining Attributes

Action Type

Double-Action or Single-Action

Firing Mechanism

Exposed or Shrouded/Internal Hammer

Common Calibers

.38 Special, .357 Magnum, .44 Magnum

Practical Considerations

• Extremely simple and reliable operation
• Not sensitive to ammunition power levels
• Low capacity (typically 5-8 rounds)
• Slow to reload compared to semi-automatics

Subcategories

Snub‑Nose CCW

Properties: 5‑shot, 1.8–2.5" barrel; ultra‑light carry, high recoil. Examples: S&W 642/638, Ruger LCR.

Medium‑Frame .357 GP

Properties: 6–7‑shot, 3–4" barrel; balance of power and control. Examples: S&W 686, Ruger GP100.

Big‑Bore Magnum

Properties: .44 Mag+, 4–6"; backcountry defense and hunting. Examples: S&W 29/69, Ruger Super Blackhawk/Redhawk.

Single‑Action Classics

Properties: manual cocking, superb triggers; hunting/cowboy action. Examples: Ruger Vaquero/Blackhawk, Colt SAA.

Representative Models

• S&W Model 686 — .357 Magnum, 6–7‑shot; duty/field; best for: versatile .357 that shoots .38s comfortably
• Ruger GP100 — .357 Magnum, 6‑shot; extremely robust; best for: hard‑use range/field gun with durability
• S&W 642 (J‑Frame) — .38 Special +P, 5‑shot; pocket CCW; best for: deep concealment, snag‑free draw
• Ruger LCR — .38/.357, 5‑shot; lightweight polymer frame; best for: light carry with good ergonomics
• S&W Model 29 — .44 Magnum, 6‑shot; backcountry defense; best for: protection in bear country/hunting sidearm

Key Concepts

• Operating systems: direct impingement vs. piston influence weight, recoil impulse, and maintenance.
• Barrel length and gas system (carbine/mid/rifle) affect reliability and blast.
• Twist rate matches bullet weight (e.g., 1:7 for 62–77gr; 1:9 for 55gr).
• Free‑float handguards, LPVOs/red dots, and suppressors expand capability.

Defining Attributes

Action

Semi-Automatic ( Gas-Operated )

Caliber

Intermediate cartridges (e.g., 5.56x45mm, .300 Blackout)

Practical Considerations

• Highly modular and customizable
• Low recoil, high capacity, and accurate
• Often subject to complex legal restrictions
• Intermediate cartridge not suitable for large game hunting

Colorado owners: SB25-003 restricts many detachable-magazine semi-automatic rifles, including AR-15/AK-pattern platforms. Check whether a specific make/model is covered and your county sheriff's eligibility-card status at Colorado Firearms Watch.

Subcategories

AR‑15 General‑Purpose (16")

Properties: 5.56 NATO, mid‑length gas; do‑everything setup. Examples: BCM RECCE, Daniel Defense DDM4V7.

AR‑15 .300 BLK Short/CQB

Properties: 8–12", optimized for suppressed use; subsonic capable. Examples: SIG Rattler, Honey Badger style builds.

AKM/AK‑Pattern

Properties: 7.62×39, long‑stroke piston; rugged, simple maintenance. Examples: WASR‑10, Arsenal SAM7, Zastava ZPAP.

Bullpup MSRs

Properties: action behind trigger; compact OAL with full barrel. Examples: IWI Tavor X95/SAR, Steyr AUG.

Representative Models

• AR‑15 16" (BCM/Daniel Defense) — 5.56 NATO, 30‑rd; general purpose; best for: reliable do‑all build with great parts support
• AR‑15 9–12" .300 BLK — 30‑rd; suppressor‑friendly CQB; best for: suppressed home defense/CQB with subsonics
• AKM pattern (WASR‑10/Arsenal) — 7.62×39, 30‑rd; rugged, simple; best for: durable rifle with simple maintenance
• IWI Tavor X95 — 5.56, 30‑rd; bullpup compactness; best for: compact OAL without NFA barrel lengths
• FN SCAR 16S — 5.56, 30‑rd; premium, lightweight receiver; best for: refined handling with premium build quality

Key Concepts

• Angular units: MOA/MRAD for dialing elevation/wind; zeroing practices (100 yd/m typical).
• External ballistics: drop, drift, density altitude; ballistic calculators and dope cards.
• Interfaces: stock vs. chassis, bedding, triggers; bipods and bags stabilize shots.

Defining Attributes

Action

Primarily Bolt-Action

Caliber

High-performance (6.5 Creedmoor, .300 Win Mag) or traditional hunting (.30-06, .270 Win)

Practical Considerations

• Supreme accuracy and long effective range
• Simple, robust, and reliable action
• Slow rate of fire compared to semi-automatics
• Precision variants can be heavy and expensive

Subcategories

Lightweight Sporter (Hunting)

Properties: 6–7.5 lb, 20–24" barrel, simple optics; field carry priority. Examples: Tikka T3x Lite, Browning X‑Bolt, Rem 700 ADL.

Precision/PRS (Chassis)

Properties: adjustable chassis, heavy barrels, match triggers. Examples: Ruger Precision Rifle, Bergara B14 HMR, Tikka CTR.

Mountain/Backcountry

Properties: ultralight builds, carbon barrels/stocks; limited strings of fire. Examples: Christensen Mesa, Savage Ultralite.

Semi‑Custom/Factory Premium

Properties: blueprinted actions, premium barrels; sub‑MOA guarantees. Examples: Seekins Havak, Tikka T3x TAC A1.

Representative Models

• Remington 700 — multiple calibers; massive aftermarket; best for: platform customization and hunting classics
• Tikka T3x — 6.5 Creedmoor/.308; smooth action, great barrels; best for: out‑of‑box accuracy/hunting precision
• Ruger Precision Rifle — chassis, folding stock; long‑range starter; best for: entry PRS/long‑range with features
• Savage 110 — AccuTrigger; strong value accuracy; best for: budget precision with upgrade path
• Browning X‑Bolt — hunting‑focused, light and precise; best for: lightweight field carry and accuracy

Key Concepts

• Operating: simple blowback vs. delayed/roller vs. gas (MPX) changes recoil feel and cleanliness.
• Suppression: subsonic 9mm + suppressor yields low blast; effective to ~100 yards.
• Compatibility: mag commonality with sidearms (e.g., Glock mags) simplifies logistics.

Defining Attributes

Action

Semi-Automatic (typically blowback or delayed-blowback)

Common Calibers

9mm (most common), .40 S&W, .45 ACP

Practical Considerations

• Very controllable; shares ammo/mags with some pistols
• Great for indoor ranges and PCC competition
• Limited range and barrier performance vs. rifles
• Aftermarket and mag compatibility vary by platform

Subcategories

AR‑9 Pattern

Properties: AR ergonomics, Glock/Colt mags; huge aftermarket. Examples: Aero EPC‑9, PSA AR‑V.

Delayed/Alternative Systems

Properties: softer impulse, cleaner; premium cost. Examples: SIG MPX (gas), B&T APC9 (delayed), MP5/clone (roller).

Simple Blowback Carbines

Properties: rugged, affordable; more bolt mass. Examples: Ruger PC Carbine, CZ Scorpion.

Race PCC (Competition)

Properties: tuned triggers, comps, optics; built for USPSA/IDPA/3‑Gun. Examples: JP GMR‑15, MBX PCC.

Representative Models

• Ruger PC Carbine — 9mm; swappable mag wells (Glock/SR); best for: budget PCC that shares pistol mags
• CZ Scorpion 3+ Carbine — 9mm; simple, reliable, affordable; best for: rugged entry PCC with huge aftermarket
• SIG MPX Carbine — 9mm; soft shooting, premium PCC; best for: smooth impulse and suppressor pairing
• AR‑9 pattern — 9mm; uses Glock/Colt mags, highly modular; best for: AR ergonomics and customization

Key Concepts

• Rimfire ignition: softer primers; ammo variability impacts reliability and precision.
• Ballistics: subsonic vs. supersonic; wind sensitivity grows past ~50 yards.
• Training: mirrors centerfire positions/optics with a fraction of the cost/recoil.

Defining Attributes

Action

Semi-Automatic or Bolt-Action

Caliber

.22 Long Rifle (common), .22 WMR, .17 HMR

Practical Considerations

• Extremely low recoil and ammo cost
• Excellent for new shooters and skill building
• Limited terminal performance and wind resistance

Subcategories

Semi‑Auto Trainers

Properties: high‑capacity mags, fast strings; great fundamentals. Examples: Ruger 10/22, T/CR22.

Bolt‑Action Precision Rimfire

Properties: match barrels/stocks, optics; NRL22/PRS22. Examples: CZ 457, Tikka T1x, Bergara B14R.

AR‑Style Rimfire

Properties: AR controls for cross‑training. Examples: S&W M&P 15‑22, Tippmann M4‑22.

Takedown/Survival

Properties: compact storage, lightweight. Examples: Ruger 10/22 Takedown, Henry AR‑7.

Representative Models

• Ruger 10/22 — semi-auto; vast aftermarket and mags; best for: low‑cost training and customization
• S&W M&P 15‑22 — AR‑style controls; training analog; best for: AR manual‑of‑arms practice
• CZ 457 — bolt‑action; renowned accuracy; best for: precision rimfire matches (NRL22/PRS22)
• Tikka T1x — bolt‑action; match‑grade feel; best for: crossover training to centerfire precision

Key Concepts

• Recoil and weight: more energy/range but heavier rifles and ammo demand better technique.
• Roles: excels as DMR/large game platform; 6.5 Creedmoor extends long‑range precision.
• Accessories: muzzle brakes tame recoil; adjustable gas helps suppressed use.

Defining Attributes

Action

Semi‑Automatic (gas‑operated)

Common Calibers

7.62×51 NATO/.308 Win, 6.5 Creedmoor

Practical Considerations

• High energy and reach; barrier/blind penetration
• Suitable for larger game and DMR roles
• Heavier rifles and ammunition; more recoil
• Higher cost of ownership and maintenance

Subcategories

AR‑10 / LR‑308 Pattern

Properties: modular ecosystem, calibers from .308 to 6.5 CM. Examples: Aero M5, DD DD5, LMT MWS.

FN SCAR 17S

Properties: lightweight receiver, short‑stroke piston; premium. Examples: SCAR 17S/20S.

M1A / M14 Pattern

Properties: classic ergonomics, iron sights; heavier, dated optics mounting. Examples: Springfield M1A, SOCOM/Scout.

HK 7.62 Derivatives

Properties: roller‑delayed (G3/PTR) or modern piston (HK417 lineage). Examples: PTR‑91, HK MR762A1.

Representative Models

• AR‑10 / LR‑308 pattern (Aero M5/DPMS) — .308; modular ecosystem; best for: configurable DMR/hunting setup
• FN SCAR 17S — 7.62 NATO; lightweight receiver, premium; best for: lightweight full‑power with premium handling
• HK MR762A1 — 7.62 NATO; HK417 lineage, robust; best for: extreme durability and accuracy
• Springfield M1A — .308; classic M14 pattern; best for: traditional ergonomics and irons

Key Concepts

• Action types: traditional tubular magazine vs. modern box magazine design affecting capacity and loading speed.
• Caliber options: pistol calibers (.357 Mag, .44 Mag, .45 Colt) for short-range versatility; rifle calibers (.30-30, .45-70) for big game hunting.
• Loading gates: traditional side-loading vs. modern tube-fed systems; some models feature both tubular and box magazine options.
• Optics mounting: modern versions include Picatinny rails and drilled/tapped receivers for scopes; traditional models use tang or receiver sights.
• Barrel lengths: carbine (16"-18") for maneuverability; full-length (20"-24") for increased velocity and accuracy.

Defining Attributes

Operating System

Manual lever action cycles a fresh cartridge with each lever stroke. Simple, reliable mechanism with fewer parts than semi-autos.

Magazine Types

Traditional tubular magazine under barrel (4-10 rounds); modern box magazines (5-6 rounds) allow pointed bullets and faster reloading.

Effective Range

Pistol calibers: 50-100 yards; .30-30: 150-200 yards; .45-70: 200-250 yards with modern loads.

Common Uses

Big game hunting, home defense (pistol calibers), cowboy action shooting, backcountry carry, traditional sport shooting.

Pros & Cons

• Fast cycling: Lever action allows rapid follow-up shots without breaking sight picture.
• Compact profile: Short overall length makes them excellent for dense woods and brush hunting.
• Proven reliability: Simple mechanical design with over 150 years of field use.
• Legal advantages: Often exempt from restrictive legislation in various jurisdictions.
• Limited capacity: Typically 4-10 rounds vs. 20-30 in modern semi-autos.
• Slower reloading: Tubular magazines require individual cartridge loading (except box-mag models).
• Optics challenges: Traditional models lack ideal scope mounting; side ejection complicates mounting on some platforms.

Subcategories

Pistol Caliber Lever-Actions

Chambered in .357 Magnum, .44 Magnum, .45 Colt — shared ammunition with revolvers, moderate recoil, excellent for home defense and short-range hunting. Examples: Henry Big Boy, Marlin 1894, Rossi R92.

Traditional Rifle Calibers

.30-30 Winchester, .35 Remington — classic American deer hunting rounds with proven terminal performance. Examples: Marlin 336, Henry .30-30, Winchester 1894.

Big-Bore Lever Guns

.45-70 Government, .444 Marlin, .450 Marlin — heavy-hitting rounds for large game (bear, elk, moose). Examples: Marlin 1895, Henry .45-70, Browning BLR.

Modern Tactical Lever-Actions

Feature rails, threaded barrels, synthetic furniture, and large-loop levers. Examples: Henry X Model, Marlin 1895 Dark Series, Mossberg 464 SPX.

Box Magazine Lever-Actions

Use detachable box magazines allowing spitzer (pointed) bullets for better ballistics. Examples: Browning BLR, Savage 99, Henry Long Ranger.

Representative Models

• Henry Big Boy — .357/.44 Mag; brass or steel receiver; classic styling; best for: traditional aesthetics and shared ammo with revolvers
• Marlin 1895 — .45-70; tubular mag, side loading gate; best for: big-game hunting and bear defense
• Henry X Model — .30-30/.45-70; tactical features, M-LOK, threaded barrel; best for: modern lever-action with accessories
• Browning BLR — .308/.270/.30-06; detachable box mag, allows spitzer bullets; best for: modern ballistics in lever platform
• Marlin 336 — .30-30; classic deer rifle, side ejection; best for: traditional hunting and reliability

Key Concepts

• CMP Program: Civilian Marksmanship Program sells authentic M1 Garands, M1 Carbines to qualified U.S. citizens at reasonable prices.
• Surplus ammunition: Many platforms use corrosive military surplus ammo (7.62x54R, 8mm Mauser); requires immediate cleaning after shooting.
• Collector grades: Condition ranges from arsenal refinished to all-original matching numbers; significantly affects value.
• Parts availability: Some platforms (Mosin, SKS) have abundant cheap parts; others (Enfield, G43) require expensive sourcing.
• Historical value: Many rifles appreciated significantly; some serve dual purpose as investments and shooters.

Defining Attributes

Action Types

Bolt-action (Mauser 98, Lee-Enfield, Mosin-Nagant), semi-automatic (M1 Garand, SKS, M1 Carbine), and select-fire (deactivated or semi-only variants).

Ammunition Considerations

Most use full-power rifle cartridges (.30-06, 7.62x54R, 8mm Mauser, .303 British). Surplus ammo often corrosive. Modern commercial loads available but expensive.

Typical Features

Iron sights (often excellent), military-grade steel construction, hardwood stocks, simple robust design prioritizing reliability over refinement.

Common Uses

Collecting, historical reenactment, Civilian Marksmanship Program (CMP) matches, hunting (where legal), recreational shooting, investment.

Pros & Cons

• Historical significance: Own and shoot pieces of military history; connection to major conflicts.
• Robust construction: Built to military standards for extreme conditions and abuse.
• Excellent iron sights: Many feature superb aperture or ladder sights designed for combat accuracy.
• Affordable entry: Some models (Mosin-Nagant, SKS) remain inexpensive; CMP Garands are excellent value.
• Heavy recoil: Full-power cartridges with heavy rifles and steel buttplates produce significant felt recoil.
• Corrosive ammo: Surplus ammunition requires immediate, thorough cleaning to prevent bore damage.
• Optics mounting: Requires gunsmithing or period-correct mounts; drilling/tapping affects collector value.
• Parts/ammunition cost: Commercial hunting ammo for obscure calibers can be expensive.

Major Categories

American Service Rifles

M1 Garand (.30-06, 8-rd en-bloc clip, semi-auto) — "The greatest battle implement ever devised" per Patton. Accurate, reliable, available through CMP. M1 Carbine (.30 Carbine, 15-rd mag, semi-auto) — Lightweight infantry carbine; low recoil, compact, fun shooter.

Soviet Service Rifles

Mosin-Nagant (7.62x54R, bolt-action) — Rugged, simple, once very cheap; long service life (1891-1960s). Various models: 91/30, M44 carbine, M38. SKS (7.62x39mm, 10-rd internal mag, semi-auto) — Intermediate cartridge carbine; predecessor to AK-47; reliable, accurate, affordable.

German Service Rifles

Mauser K98k (8mm Mauser/7.92x57, bolt-action) — Iconic German WWII rifle; excellent controlled-round-feed action; foundation for many modern hunting rifles. Very collectible; matching numbers command premiums.

British Service Rifles

Lee-Enfield No.4 Mk I (.303 British, bolt-action, 10-rd detachable mag) — Smooth, fast bolt action; excellent military trigger; renowned accuracy. Used extensively in both World Wars.

Collectible Semi-Autos

SVT-40 (Soviet 7.62x54R semi-auto), Gewehr 43 (German 8mm semi-auto), MAS-49/56 (French 7.5mm semi-auto) — Rare, expensive, historically significant self-loading rifles.

Representative Models

• M1 Garand — .30-06; 8-rd en-bloc; semi-auto; CMP available; best for: historic shooting and CMP matches
• M1 Carbine — .30 Carbine; 15-rd; lightweight; low recoil; best for: fun shooter and light hunting
• Mosin-Nagant 91/30 — 7.62x54R; bolt-action; rugged; affordable; best for: budget entry to milsurp collecting
• SKS — 7.62x39mm; semi-auto; 10-rd; reliable; best for: affordable semi-auto shooter with AK heritage
• Mauser K98k — 8mm Mauser; bolt-action; collectible; best for: WWII collecting and precision shooting
• Lee-Enfield No.4 Mk I — .303 British; fast bolt; 10-rd mag; best for: smooth action and historical significance

Key Concepts

• Patterning and chokes: pattern size and density depend on load and choke (cyl → IC → Mod → Full).
• Shell types: birdshot vs. buckshot vs. slugs; pellet size (#8 to 00) drives use case.
• Length and handling: 18.5" tactical vs. 26–28" field barrels alter swing/precision.

Defining Attributes

Action

Manual Pump-Action

Gauge

12 Gauge (most common), 20 Gauge

Practical Considerations

• Extremely reliable, durable, and affordable
• Cycles a wide variety of shell types reliably
• Slower rate of fire than a semi-auto
• User can cause a jam by "short-stroking" under stress

Subcategories

Tactical/Home Defense

Properties: 18–19", ghost ring/bead sights, extended tubes. Examples: Mossberg 590A1, Remington 870 Police.

Field/Upland

Properties: 26–28" vent‑rib, interchangeable chokes. Examples: Mossberg 500 Field, Remington 870 Wingmaster.

Combo/Convertible

Properties: field + short barrel sets; versatile. Examples: Mossberg Combo kits.

Retro/Trench‑Style

Properties: heat shields/bayonet lugs; collector appeal. Examples: Ithaca 37 clones, retro 1897 styles.

Representative Models

• Mossberg 500/590 — 12/20 ga; ambi‑friendly controls, duty staple; best for: versatile home defense/field use
• Mossberg 590A1 — 12 ga; heavy‑barrel, military‑spec durability; best for: hard‑use tactical reliability
• Remington 870 — 12/20 ga; classic, wide parts ecosystem; best for: broad aftermarket and hunting variants
• Winchester SXP — 12/20 ga; fast action, budget‑friendly; best for: affordable starter pump

Key Concepts

• Gas vs. inertia: gas runs softer with light loads; inertia favors simplicity and easy cleaning.
• Load sensitivity: tuning (pistons/springs) optimizes reliability across ammo types.
• Competition mods: extended tubes, lifters, and ports improve speed.

Defining Attributes

Action

Semi-Automatic (Gas- or Inertia -operated)

Gauge

12 Gauge, 20 Gauge

Practical Considerations

• Fast rate of fire and reduced felt recoil
• Excellent for shooting sports and waterfowl hunting
• More expensive and complex than pump-actions
• Can be sensitive to light ammunition loads

Subcategories

Gas‑Operated Tactical

Properties: fast cycling, softer recoil; optics/rail options. Examples: Beretta 1301, Benelli M4 (ARGO).

Gas‑Operated Hunting

Properties: 26–28" barrels, 3"/3.5" chambers. Examples: Beretta A300/A400, Remington V3/Versa Max.

Inertia 3‑Gun

Properties: light, simple, blazing splits. Examples: Benelli M2/M2 Performance Shop, Franchi Affinity 3.

Inertia Field

Properties: lighter carry, fewer parts, easy to maintain. Examples: Benelli SBE3, Browning A5 (Kinematic Drive).

Representative Models

• Beretta 1301 — 12 ga, gas; very fast cycling, tactical/comp; best for: defensive semi‑auto with fast splits
• Benelli M4 — 12 ga, gas (ARGO); combat‑proven reliability; best for: duty‑grade reliability, heavy loads
• Benelli M2 — 12 ga, inertia; lightweight, popular in 3‑Gun; best for: competition speed and simplicity
• Browning A5 — 12/20 ga, inertia; hunting‑focused classic profile; best for: field hunting with inertia simplicity

Key Concepts

• Action types: Over/Under (O/U) for consistent sight plane; Side-by-Side (SxS) for traditional aesthetics; Single-shot for simplicity and economy.
• Choke systems: fixed chokes vs. interchangeable screw-in chokes determine shot pattern spread; typical combinations: IC/M, M/F, or adjustable.
• Barrel selection: O/U typically use bottom barrel first; selectors allow choosing which barrel fires; important for choke management.
• Triggers: single selective trigger (SST) fires both barrels sequentially; double triggers give instant barrel selection.
• Fit and mount: break-actions emphasize proper gun fit; stock dimensions (LOP, drop, cast) critical for consistent mounting and accuracy.

Defining Attributes

Operating System

Manual break-action. Shotgun "breaks" open at the breech via a top lever, exposing chamber(s) for loading. After firing, manually eject and reload.

Capacity

Single-shot (1 round), double-barrel (2 rounds). Reloading requires breaking action open, removing spent shells, inserting fresh shells.

Reliability

Extremely reliable due to simple mechanical design. No gas system, no magazines, minimal parts. Virtually immune to cycling failures.

Common Uses

Sporting clays, trap, skeet, upland bird hunting (pheasant, quail, grouse), waterfowl hunting, traditional driven shoots, youth/entry shotguns (single-shot).

Pros & Cons

• Simplicity & reliability: Minimal moving parts; no cycling failures or jams.
• Two chokes available: O/U and SxS offer two different choke constrictions instantly available via barrel selection.
• Superior balance: Well-designed break-actions balance naturally and mount smoothly for instinctive shooting.
• Safety: Visibly open chamber when broken; easy to confirm unloaded status at a glance.
• Limited capacity: 1-2 shots before manual reload. Not ideal for home defense or high-volume shooting.
• Slow reloading: Breaking action, extracting shells, and reloading is slower than pump or semi-auto.
• Cost: Quality O/U shotguns are expensive (premium models $2,000-$10,000+); budget options available but quality varies.
• Weight: Many models are heavy (8-9 lbs) to reduce recoil for clay sports; can be tiring for all-day carry.

Subcategories

Over/Under (O/U) Shotguns

Barrels stacked vertically provide consistent sight plane. Dominant in clay sports (trap, skeet, sporting clays) and upland hunting. Single sighting plane aids consistent aiming. Examples: Browning Citori, Beretta 686/687, CZ Redhead Premier, Franchi Instinct.

Side-by-Side (SxS) Shotguns

Barrels arranged horizontally; traditional aesthetic favored by purists. Wider sighting plane; slimmer profile; classic British and American design. Popular for upland hunting and driven game. Examples: CZ Bobwhite, Stoeger Coach Gun, Stevens 555.

Single-Shot Shotguns

Single barrel, one shot capacity. Ultra-simple, affordable, lightweight. Excellent for youth, beginners, or backcountry minimalists. Examples: H&R Pardner, Stevens 301, Rossi single-shot, break-action .410 models.

Competition O/U

Purpose-built for clay sports with adjustable combs, extended chokes, ported barrels, and wider ribs. Heavier for reduced recoil. Examples: Browning Citori 725 Sporting, Beretta 694/695, Krieghoff K-80, Caesar Guerini.

Budget vs. Premium

Budget ($400-$1,200): CZ, Stoeger, TriStar, Stevens — Turkish imports or entry-level European. Mid-Range ($1,200-$3,000): Browning Citori, Beretta 686, Franchi. Premium ($3,000+): Beretta 694/SO series, Krieghoff, Perazzi, Holland & Holland — hand-fitted, heirloom quality.

Representative Models

• Browning Citori — 12/20/28/.410 ga; O/U; reliable, well-balanced; best for: all-around sporting and hunting
• Beretta 686/687 Silver Pigeon — 12/20 ga; O/U; Italian craftsmanship; best for: sporting clays and upland hunting
• CZ Redhead Premier — 12/20 ga; O/U; budget-friendly, quality Turkish import; best for: entry-level O/U shooting
• CZ Bobwhite — 12/20/28/.410 ga; SxS; color case-hardened; best for: traditional upland hunting aesthetics
• Stoeger Coach Gun — 12/20 ga; SxS; short barrels (20"); best for: cowboy action and short-range defense
• H&R Pardner — 12/20/.410 ga; single-shot; ultra-affordable; best for: youth introduction and budget entry
• Stevens 301 — 12/20/.410 ga; single-shot; Turkish import; best for: beginner shotgun and backcountry simplicity

Key Concepts

• Bullpup design: Magazine/action behind trigger reduces overall length while maintaining full barrel length; compact for confined spaces.
• Dual-tube magazines: Some designs (Kel-Tec KSG) feature two tubular magazines with manual selector for 14+ round capacity.
• Lever-action shotguns: Manual lever operation combines cowboy aesthetics with modern shotgun utility.
• Non-traditional controls: Bullpups and specialty designs often have unfamiliar manual of arms; training required to build proficiency.

Subcategories

Bullpup Shotguns

Kel-Tec KSG (12 ga, dual-tube pump, 14+1 capacity) — Extremely compact (26.1" OAL with 18.5" barrel); select between two 7-round tubes; innovative but requires training. IWI Tavor TS12 (12 ga, semi-auto, 15+1 capacity) — Three 5-round tubes rotate manually; gas-operated semi-auto; very short overall length.

Lever-Action Shotguns

Henry Lever .410 (.410 bore, lever-action, tube-fed) — Classic lever-action in shotgun form; cowboy appeal; limited capacity. Chiappa 1887 (12 ga, lever-action) — Reproduction of Winchester 1887; Terminator 2 fame; more novelty than practical.

Revolving Shotguns

Circuit Judge (.410/45 Colt, revolver cylinder, rifle stock) — Unique combination; cylinder holds 5 rounds; dual-caliber capability; niche use.

Specialty Tactical

Mossberg 590M (12 ga, detachable box magazine, 10/15/20-rd) — Pump-action with AR-style magazines instead of tube; faster reloads but heavier and bulkier.

Pros & Cons

• Compact design: Bullpups achieve short overall length with full-length barrels.
• High capacity options: Dual-tube designs (KSG, TS12) offer 14-16 round capacity.
• Unique manual of arms: Lever-action offers classic appeal and legal advantages in some regions.
• Unconventional controls: Requires dedicated training; muscle memory from standard shotguns doesn't transfer well.
• Reliability concerns: Some specialty designs (KSG) have had teething issues; less proven than traditional pumps.
• Complexity: More moving parts and mechanisms can mean more maintenance and potential failure points.

Representative Models

• Kel-Tec KSG — 12 ga; bullpup; dual-tube pump; 14+1; best for: maximum capacity in compact package
• IWI Tavor TS12 — 12 ga; bullpup; semi-auto; rotating tri-tube; 15+1; best for: high-capacity semi-auto bullpup
• Henry Lever .410 — .410 bore; lever-action; tube-fed; best for: cowboy appeal and classic styling
• Mossberg 590M — 12 ga; pump; detachable box mag; 10/15/20-rd; best for: magazine-fed pump experimentation
• Chiappa 1887 — 12 ga; lever-action; reproduction; best for: novelty and historical recreation

Defining Attributes

Action

Select-Fire

Caliber

Intermediate (5.56x45mm, 7.62x39mm)

Examples

M4 Carbine, M7 (SIG MCX-SPEAR, 6.8×51mm — NGSW, type classified May 2025, fielding began March 2024), AKM/AK-74, Steyr AUG

Tactical Strengths & Limitations

• Excellent balance of features for general combat
• Less range/power than a Battle Rifle

Defining Attributes

Action

Select-Fire / Fully Automatic

Caliber

Pistol (9mm, .45 ACP)

Examples

H&K MP5, Uzi, FN P90 (PDW)

Tactical Strengths & Limitations

• Very compact and controllable in full-auto
• Limited effective range and poor barrier penetration

Defining Attributes

Action

Fully Automatic

Feed System

Belt-Fed

Classes

LMG/SAW (M249 → M250 replacing, type classified May 2025), GPMG (M240), HMG (M2)

Tactical Strengths & Limitations

• Provides immense suppressive fire capability
• Very heavy, consumes ammunition rapidly

The Misconception

Movies and games often depict people being hurled through the air by gunfire, implying the bullet imparts enough force to physically knock targets down.

The Reality: Newton's Third Law

• For every action, there is an equal and opposite reaction.
• If a bullet could topple a 180 lb person by pure force, the equal recoil on an ~8 lb rifle and shooter would launch them backwards too — which does not happen.
• Firearms incapacitate by rapid disruption of vital tissue and the nervous system, not by kinetic “push.”

The Takeaway

Firearms wound through tissue destruction, not kinetic push. The “knockdown” effect is cinematic, not physical reality.

The Misconception

Because of its military styling and media attention, the AR‑15 is often assumed to be more powerful than common civilian hunting rifles.

The Reality: Intermediate vs. Full‑Power

• Intermediate cartridges (5.56×45mm, 7.62×39mm) balance recoil, weight, and controllability for military use.
• Full‑power cartridges (.30‑06, .308 Win, .270 Win) used in many hunting rifles are larger and carry substantially more energy.
• Typical muzzle energy: ~1,800 J for 5.56mm vs. ~3,900 J for .30‑06 — more than double.
• Many jurisdictions restrict 5.56mm for deer‑sized game due to limited terminal performance.

The Takeaway

The AR‑15 commonly fires an intermediate round; traditional hunting rifles often fire larger, more powerful ammunition.

The Misconception

Films reduce suppressed gunfire to a faint “pew,” implying near‑silence.

The Reality: Managing Supersonic Gas

• A gunshot’s sound has two parts: muzzle blast (propellant gases) and the bullet’s supersonic crack .
• A suppressor works like a muffler, cooling and slowing gas with baffles to cut the blast.
• It does not affect the bullet’s sonic crack; true quiet requires subsonic ammo .
• Suppressed supersonic rifle shots are still ~130–140 dB — loud, though often hearing‑safe compared to >160 dB unsuppressed.

Regulatory Note (U.S.)

As of January 1, 2026, the $200 NFA transfer tax on suppressors (and SBRs, SBSs, AOWs) was eliminated by the One Big Beautiful Bill Act (H.R. 1, signed July 4, 2025). ATF Form 4 approval, background check, and registration remain required; machine guns and destructive devices still carry the $200 tax. State-level restrictions continue to apply.

The Takeaway

Suppressors reduce “instantly deafening” to “hearing‑safer,” not silent.

The Misconception

Games often depict a huge cone of damage that hits anything in a room and fades out completely beyond short range.

The Reality: Patterning and Chokes

• A shotgun launches a pattern of pellets that gradually spreads; at 7–10 yards, it’s often the size of a fist to a dinner plate.
• Chokes at the muzzle control spread: tighter (Full) for longer range, open (Cylinder) for faster spread.
• With appropriate choke and load, shotguns remain effective to 40–50 yards for wingshooting.

The Takeaway

Shotguns are precision tools at indoor distances; they still require careful aiming and pattern knowledge.

The Misconception

Larger handgun calibers (.40/.45) are assumed to reliably “drop” attackers faster than 9mm.

The Reality: Penetration, Disruption, and Human Factors

• Modern duty JHP loads in 9mm, .40, and .45 are engineered to meet similar FBI gel standards: 12–18 inches penetration with controlled expansion.
• Physiological incapacitation results from disruption of CNS or rapid blood‑loss; both require adequate penetration and accurate hits under stress.
• Recoil and capacity matter to outcomes: 9mm offers faster follow‑ups and more rounds on board, improving hit probability.
• Temporary cavity from handguns is generally insufficient to cause remote injury; permanent cavity (the hole) is what matters most.

The Takeaway

Placement and penetration trump caliber size among common service cartridges; shoot the most controllable load that meets duty standards.

The Misconception

Hollow‑point handgun rounds are believed to expand perfectly and always remain in the target, eliminating over‑penetration risk.

The Reality: Thresholds, Barriers, and Design

• Expansion requires sufficient impact velocity ; short barrels can drop velocity below expansion thresholds.
• Common barriers (denim, auto glass, sheet metal) can clog cavities or deform bullets; FBI protocols test across these precisely because expansion is not guaranteed .
• Even expanded JHPs can exit; the largest risk to bystanders is still missed shots, not through‑and‑through hits.
• Bonded designs trade expansion diameter for barrier integrity ; non‑bonded may expand more but fragment through glass.

The Takeaway

Quality JHPs reduce—not eliminate—over‑penetration; shot placement and backdrop awareness remain essential.

The Misconception

5.56×45mm is said to “tumble wildly” in flight, explaining wounding behavior.

The Reality: Gyroscopic Stability vs. Tissue Yaw

• In air, bullets are gyroscopically stabilized by spin; they fly point‑forward when properly matched to barrel twist.
• Upon entering tissue, drag forces cause yaw; some 5.56 FMJ loads can fragment when velocity exceeds ~2,300–2,700 fps.
• Short barrels reduce velocity and thus the fragmentation window , often leading to narrower wound tracks.
• Bullet construction (OTM, bonded, monolithic) governs whether it yaws, fragments, or mushrooms in tissue.

The Takeaway

Tumbling is a tissue phenomenon, not an in‑air behavior; terminal effects depend on speed and construction.

The Misconception

Compact AR pistols/SBRs are thought to match 16–20" rifles except for a little muzzle flash.

The Reality: Velocity, Gas System, and Bullet Design

• 5.56 performance is velocity‑sensitive ; chopping from 20" to 10.3" can cost 400–700 fps depending on load.
• Below certain speeds, FMJ/OTM loads stop fragmenting , reducing wound severity and barrier disruption.
• Short gas systems increase dwell pressure and blast; reliability requires tuned buffers, springs, and port sizes.
• Loads optimized for short barrels (e.g., bonded soft points) can reclaim some terminal effect at lower velocities.

The Takeaway

Short barrels trade velocity and terminal effect for compactness; choose bullets designed for SBR speeds.

The Misconception

Movies show pistols punching through vests; reality is standard soft armor neutralizes typical handgun threats.

The Reality: NIJ Levels and Threats

• Level II/IIIA soft armor is rated for 9mm/.40/.45 and .357/.44 Magnum profiles— not for common rifle threats.
• Rifle rounds (5.56, 7.62×39, .308) typically require Level III/IV plates rated for high‑energy penetrators.
• Specialty pistol armor‑piercing or high‑velocity loads can challenge soft armor, but are atypical and often restricted.
• Backface deformation can still injure even when bullets don’t penetrate; armor mitigates lethality but does not remove trauma.

The Takeaway

Handguns rarely penetrate quality soft armor; rifles are a different threat category requiring hard plates.

The Misconception

Bullets are believed to become harmless on water impact or stop within inches regardless of caliber.

The Reality: Hydrodynamic Drag and Angle

• High‑velocity projectiles can fragment or yaw abruptly on entry due to extreme drag, dumping energy quickly.
• At shallow angles, rounds often ricochet off the surface; at steeper angles, they can penetrate several feet depending on speed and construction.
• Handgun rounds typically travel several feet in water; rifle rounds may fragment early but can remain dangerous near the surface.
• Real‑world outcomes depend on angle, distance, bullet type , and whether the projectile destabilizes.

The Takeaway

Water is not a magic shield; it rapidly slows bullets but does not guarantee safety near the surface.

The Misconception

Engaging a manual safety is thought to eliminate discharge risk entirely.

The Reality: Layers and Human Factors

• Safeties address specific failure modes (e.g., trigger movement) but cannot prevent negligence like pressing the trigger or pointing at non‑targets.
• Drop safeties and firing‑pin blocks mitigate mechanical accidents ; they do not override the Four Rules.
• Complex safeties can induce mode errors under stress if users rely on them instead of sound handling.
• Training emphasizes holistic risk reduction : muzzle discipline, trigger discipline, and target awareness.

The Takeaway

Safeties are one layer; safe outcomes depend on behavior and fundamentals.

The Misconception

Firing into the air or aiming for limbs reduces lethality and liability.

The Reality: Ballistics and Outcomes

• Bullets fired upward can travel far; returning rounds still cause injury. Ground impacts ricochet unpredictably .
• Limbs are small, fast‑moving targets with major vessels; misses endanger bystanders, and hits can still be fatal.
• Effective defensive shooting prioritizes high‑probability stops (upper thoracic/CNS) when deadly force is justified.
• Many jurisdictions treat warning shots as use of deadly force ; consult local law and training best practices.

The Takeaway

Low‑probability shots increase risk; prioritize control, backdrop, and lawful intent.