Data Quality84%
MASS(Military Archive Scoring System)
ⓘ Regardless of era, the same scoring system applies to all units in the combat shotguns category.
01 / Overview
Atchisson Assault Shotgun
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
COMBAT SHOTGUNS · POST-COLD WAR
19
PERFORMANCE/PRICE
78
UNIT COST (2025 USD)
—
ⓘ Performance/Price and MASS score are computed across all units in the combat shotguns category, regardless of era.
02 / Specs & Design
◎General5MOD.5
- First Production Year1972
- DesignerMaxwell Atchisson (1930–2003); further developed by Military Police Systems, Inc.
- Weight (Empty)5.2 kg
- Weight (Loaded)7.3 kg
- Currently In ServiceYes
◈Cartridge & Calibre5MOD.5
- Cartridge12 gauge
- Calibre18.53 mm
- Calibre Classshotgun
- RimfireNo
- Caseless AmmunitionNo
▣Operation7MOD.7
- Action TypeGas-Operated
- Fire Modesfully automatic
- Select FireYes
- Feed SystemDrum
- Magazine Capacity8
- Drum / Belt Capacity20
- Cyclic Rate of Fire300
◇Ballistics3MOD.3
- Muzzle Velocity350 m/s
- Effective Range (point)100 m
- Maximum Range200 m
◆Barrel & Sights4MOD.4
- Barrel Length457 mm
- Sight TypeIron sight, 2× zoom optical scope|
- Optic RailYes
- Iron SightsYes
▤Construction3MOD.3
- Folding / Collapsing StockNo
- Bullpup LayoutNo
- Modularityrail system for optics
⬢Features2MOD.2
▲Production & Cost2MOD.2
- Production Start2005
- Variants1
03 / History
SERVICE LIFESPANStill in Service
- 2005Production started
21
years in service
1
countries operating
ⓘ The producing country still actively operates it. 2 countries retired it.
05 / MASS Score
COMBAT SHOTGUNS RANKING Combat Shotguns · Post-Cold War
MASS RANKINGSMASS ↗
47COMBAT SHOTGUNS19POST-COLD WAR · COMBAT SHOTGUNS850UNITED STATES · ALL WEAPONS39PERFORMANCE/PRICE · COMBAT SHOTGUNS
ⓘ Rankings are within theCombat Shotgunscategory.
📖 TERMS ON THIS PAGE5terms
A cylindrical ammunition container, typically mounted on a firearm, that holds cartridges in a spiral arrangement for feeding into the chamber.
Firearm action type where expanding gas from a fired cartridge cycles the mechanism, typically via a piston or direct impingement.
Adjustable metal aiming devices on firearms, consisting of a front post and rear notch, used without magnification.
A mounting system for attaching optical sights to rifles.
Select fire is a fire selector mechanism on a firearm that lets the shooter choose the firing mode, such as semi‑automatic, burst, or fully automatic.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources