Overview [ ]
Atchisson Assault Shotgun
Designers
Maxwell Atchisson
Period Designed
1972 - 1987
Manufacturer
Maxwell Atchisson
Action
Forced gas-operated, API blowback, open bolt
Feed System
Detachable box magazine
Ammunition Loading
8-rnd box magazine
The Atchisson Assault Shotgun is an American prototype shotgun developed by Maxwell Atchisson. It was further developed into the AA-12 by Military Police Systems .
The prototype was constructed from a variety of other firearms including parts from a M1918 BAR and furniture from an M16A1 .
The rights of the weapon were sold to Jerry Baber of Military Police Systems in 1987, who developed the firearm further and overhauled it into the AA-12 which was demonstrated to the U.S. Military in 2004.
Maxwell Atchisson Products
Firearms
Rifles
CRACK • Packer
Shotguns
Assault Shotgun
Submachine Guns
.22 Submachine Gun • Model 57
Infantry Weapons
Melee Weapons
Knives
Ka-Bar • M7 • M9 • M11 • OKC-3S
Sidearms
Pistols
Gyrojet • M9 (A1 • A2 • A3 • A4 ) • MK 22 MOD 0 • XM11
Machine Pistols
M10 • M11 • MP9
Close Quarters
Personal Defense Weapons
IO MP2
Submachine Guns
Colt RO635
Shotguns (automatic)
Atchisson Assault Shotgun
Shotguns (semi-automatic)
[[]]
Shotguns (manual-action)
Mossberg 500 (A ) • Mossberg 590 • Remington 870 (Express • Magnum • TA Trap • TB Trap • TC Trap )
Primary Weapons
Assault Rifles
Colt 601 • Colt 602 • M16 (A1 • A2 • A3 • A4 ) • M17S • Stoner 63 (A ) • XM22 (E1 )
Assault Carbines
XM177 (E1 • E2 )
Battle Rifles
AR-10 (A • A2 • A2C • A4 • A4C • B ) • M14 (E1 • E2 )
Battle Carbines
[[]]
Civilian Rifles
SIG AMT
Automatic Support Weapons
Light Machine Guns
M15 • Stoner 86
General Purpose Machine Guns
[[]]
Heavy Machine Guns
[[]]
Long Range
Anti-Materiel Rifles
[[]]
Bolt-Action Rifles
M24 (A1 • A2 • A3 • E1 ) • M40 (A1 • A3 • A5 • A6 • A7 ) • Remington 700
Designated Marksman Rifles
M21 SWS
Launchers
Grenade Launchers (Attachment)
40mm M203 (A1 • A2 )
Grenade Launchers (Standalone)
40mm China Lake • 40mm EX 41 • 40mm M32 • 40mm M79 • 40mm T148E1
Disposable Rocket Launcher
83.5mm M141 • 84mm M136 • 139.7mm FGM-172
Rocket Launchers
66mm M72 (A1 • A2 • A3 ) • 66mm M202 (A1 ) • 84mm M3 MAAWS
Underwater Weapons
Assault Rifles
[[]]
Explosives
Anti-Personnel Mines
M18 (A1 ) • MM-1
Anti-Tank Mines
M15 • M19 • M21
Offensive Grenades
AN/M14 Thermite • M7A3 CS Gas • M25A2 Riot Control • M47 Riot Control • M67 Frag • M84 Stun
Smoke Grenades
AN/M8 • AN/M18 • AN/M83 White Smoke Grenade
Firearm Accessories
Weapon Sights
Collimator
Crossfire • Razor • RX30 • Razor AMG UH-1 • SPARC AR • SPARC II • Spitfire 3x • Spitfire AR • Strikefire II • Venom • Viper
Holographic
EOTech 553
Iron
[[]]
Night
[[]]
Reflector
[[]]
Telescopic
[[]]
Attachments
Flashlights & Lasers
[[]]
Foregrips & Bipods
[[]]
Infantry Equipment
Camouflage
Camouflage
ERDL • OD • MARPAT • UCP • Woodland
Clothing
Backpacks
[[]]
Body Armour
[[]]
Bomb Suit
[[]]
Elbow and knee pads
[[]]
Signals & IFF
[[]]
Suits
[[]]
Vests & Webbing
[[]]
Headwear
Communication
[[]]
Gas Masks & Rebreathers
[[]]
Goggles
[[]]
Helmets
[[]]
Vehicle Headwear
[[]]
Optics, Detection and Surveillance
Man-Portable Radar
[[]]
Mine Detectors
[[]]
Night Vision Goggles
[[]]
Periscopes
[[]]
Rangefinders
[[]]
Surveillance
[[]]
Artillery
Anti-Aircraft Guns
[[]]
Anti-Tank Guns
[[]]
Field Guns
[[]]
Howitzers
[[]]
Infantry & Mountain Guns
[[]]
Mortars
81mm M252 • 107mm M30 • 120mm M121
Railroad Artillery
[[]]
Recoilless Guns
[[]]
Rocket Artillery
[[]]
Siege Artillery
[[]]
Land Vehicle Weapons
Machine Guns
5.56mm
M231 FPW
7.62mm
FN MAG • GAU-19 • M37 • M60 • M73 • M219 • M240 • M1919A4
12.7mm
GAU-19 (A • B ) • M2 • T175 (E1 ) • XM238
Tank Guns
76.2mm
M32 • T91 (E1 • E2 • E3 ) • T185 (E1 )
90mm
M3 • M41 • M54 • T7 • T15E2 • T54 • T76 • T125 • T208 (E9 • E13 ) • T209
105mm
M68 (A1 • E1 ) • QF20 Pdr • T5E1 • T5E2 • T140 (E3 • E4 ) • T147 • T254 (E2 ) • X15E8 • XM35
120mm
M58 • M256 • T53 • T122 • T123E1 • T123E6 • T179 • Rheinmetall • X23
152mm
M81 (E1 ) • XM81 (E6 ) • XM150 (E5 • E6 )
155mm
T7 (E1 ) • T180
165mm
M57 • T156
175mm
M113 • T256E3
203.2mm
M1
Howitzers
105mm
M2 (A2 ) • M4 • M49 • T96E1 • M103 • XM104 • XM103
155mm
M45 • M126 (A1 ) • M185 • T186E1 • M284
203.2mm
M1 • M2 (A1 • A2 ) • M201A1
240mm
240mm M1
Autocannons
20mm
M168 • Rh 202
25mm
M242 • Oerlikon KBA
30mm
Bushmaster III
40mm
M2 (A1 )
75mm
75mm XM274
Recoilless Guns
106mm
M40 (A1 )
Misc.
Spotting Rifles
M8
Aircraft Weapons & Munitions
12.7mm Aircraft Machine Guns
Browning M2 (AN/M2 • AN/M3 ) • GAU-19
Aircraft Cannons below & including 30mm
20mm AN/M2 • 20mm AN/M3 • 20mm M24 • 20mm FMC T-160
Aircraft Cannons above 30mm
[[]]