302:, a feature more commonly found in submachine guns, as well as heavy and squad-level machine guns. The weapon uses an Advanced Primer Ignition blowback which strikes the shotgun shell when moving forward before placed in-battery (fully chambered) overcoming the forward inertia of the bolt and offering low recoil. It uses 8-round box or 20-round drum magazines, as opposed to the original 5-round box magazine. Due to the abundant use of stainless steel and the designed clearance for fouling, MPS has stated that the weapon requires little to no cleaning or lubrication. The designer states that cleaning is required after 10,000 rounds. A rail system is also available for modern sighting options. Because of an open bolt design, the AA-12 can reportedly operate after being submerged in water.
287:. MPS in turn developed the successor simply known as Auto Assault-12, which was redesigned over a period of 19 years with 188 changes and improvements to the original blueprint, modifications included changing the AA-12 from blowback- to gas-operated with a locked breech. "When the bolt flies back after firing to cycle another round, around 80% of what would normally be felt as recoil is absorbed by a proprietary gas system. A recoil spring grabs another 10%, leaving the final recoil a remarkable 10% of the normal recoil for a 12-gauge round—so you can point the AA-12 at a target and unload the full magazine without significant loss of accuracy". MPS also teamed up with Action Manufacturing Company, and Special Cartridge Company to combine the gun with
42:
246:
developed in 1972 by
Maxwell Atchisson (however, the original development by Atchisson seems to have produced only a few guns at prototype-level, with the development that ultimately led to the gun entering the market being done later by Military Police Systems, Inc.). The most prominent feature is
744:
DefenseReview.com (DR): An online tactical technology and military defense technology magazine with particular focus on the latest and greatest tactical firearms news (tactical gun news), tactical gear news and tactical shooting
258:
mode only. However, the relatively low cyclic rate of fire of around 300 rounds per minute enables the shooter to fire individual rounds through the use of short trigger pulls. It is fed from either an 8-round
247:
reduced recoil. The current 2005 version has been developed 19 years since the patent was sold to
Military Police Systems, Inc. The original design was the basis of several later weapons, including the
333:
The Hammer unmanned defense system by More
Industries proposed to use dual-mounted AA-12s on the H2X-40 turret. Neural Robotics also wanted to mount the weapon on their AutoCopter
993:
786:
577:
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611:
298:
model has a 13-inch barrel, and is half a pound lighter than the regular model. Uncommon in other automatic shotguns, the AA-12 fires from an
294:
The weapon was lightened to 4.76 kg (10.5 lb) and shortened to 966 mm (38.0 in) but retained the same barrel length. The
765:
739:
530:
438:
17:
1003:
838:
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988:
920:
815:
598:
During a
Blackwater shoot, 5000 rounds were fired through a single weapon without cleaning or a drop of Lube.
351:
112:
5.2 kg (11 lb) less magazine. 7.3 kg (16 lb) with loaded 32-round drum (original version)
790:
640:
505:
998:
889:
585:
327:
714:
619:
386:
946:
552:
439:"Auto Assault-12 (AA-12) Full-Auto Machine Shotgun/FRAG-12 High-Explosive Round Combo/Weapon System!"
283:
In 1987, Max
Atchisson sold the rights of the AA-12 to Jerry Baber of Military Police Systems, Inc.,
962:
490:
334:
930:
284:
925:
894:
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8:
538:
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By 2004, ten firing models of the AA-12 had been produced and were demonstrated to the
873:
462:
689:
852:
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155:
55:
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177:
81:
Maxwell
Atchisson (1930–2003); further developed by Military Police Systems, Inc.
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58:
664:
982:
904:
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The AA-12 is capable of firing various types of 12-gauge ammunition such as
315:
260:
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167:
160:
41:
740:"Hammer Remotely-Operated Weapons System for Robotic and Manned Vehicles"
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is located at the top of the gun and does not reciprocate during firing.
807:
221:
127:
766:"Neural Robotics Incorporated equips AutoCopter with 12-gauge shotgun"
299:
366:
311:
288:
248:
243:
612:"Made in the USA: The AA12 Shotgun by Christopher R. Bartocci"
291:
High-Explosive ammunition into a multifunction weapon system.
967:
120:
991 mm (39.0 in) (Atchisson
Assault Shotgun, 1972)
295:
787:"Remote Control Helicopter With Full-Auto Shotgun"
641:"The AA-12: The Full Auto Shotgun From The Future"
506:"The AA-12: The Full Auto Shotgun From The Future"
980:
582:Guns, Hunting, Shooting at The Old Deer Hunters
529:Moore, Jacob; Ruble, Drew (July–August 2009).
823:
690:"Shoot! An Appalachian gunsmith's robot army"
387:"10 Incredible Weapons That Only America Has"
198:200 m (220 yd) (FRAG-12 ammunition)
665:"AA-12 Fully Automatic Shotgun!!! - YouTube"
763:
830:
816:
528:
412:
994:Weapons and ammunition introduced in 1972
837:
609:
238:), originally designed and known as the
190:100 m (110 yd) (12 gauge slug)
122:966 mm (38.0 in) (AA-12, 2006)
687:
610:Bartocci, Christopher R. (2014-05-16).
463:"FRAG-12 Shotgun Ammunition Fact Sheet"
408:
406:
384:
14:
981:
712:
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433:
431:
503:
403:
415:"Modern Firearms – Atchisson AA-12"
24:
737:
428:
25:
1015:
789:. 10 January 2008. Archived from
713:Metesh, Logan (29 January 2019).
584:. August 11, 2010. Archived from
330:, who did not adopt the weapon.
187:Effective firing range
40:
779:
757:
731:
706:
681:
657:
633:
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491:"AA-12 Magazines & History"
570:
545:
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497:
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385:Johnson, Robert (2011-04-29).
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195:Maximum firing range
182:350 m/s (1,100 ft/s)
46:AA-12 automatic combat shotgun
13:
1:
1004:Shotguns of the United States
715:"The AA-12 Automatic Shotgun"
372:
352:List of API blowback firearms
305:
764:Blass, Evan (1 March 2006).
688:Ratliff, Evan (2009-02-23).
7:
504:Pike, Travis (2021-07-10).
340:
10:
1020:
578:"Military Assault Shotgun"
328:United States Marine Corps
278:
133:457 mm (18.0 in)
955:
947:Atchisson assault shotgun
939:
913:
882:
861:
845:
242:, is an automatic combat
240:Atchisson Assault Shotgun
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72:
65:Place of origin
64:
51:
39:
32:
18:Atchisson Assault Shotgun
321:
27:Automatic combat shotgun
531:"The Automatic Warrior"
335:unmanned aerial vehicle
254:. The shotgun fires in
224:, 2× zoom optical scope
931:Mk 19 grenade launcher
926:Heckler & Koch GMG
553:"AA-12 combat shotgun"
285:Piney Flats, Tennessee
168:Rate of fire
989:API blowback firearms
839:API blowback firearms
210:, 20 or 32 rounds in
89:Original design: 1972
719:High Caliber History
178:Muzzle velocity
616:SmallArmsReview.com
999:Automatic shotguns
874:Solothurn S-18/100
73:Production history
976:
975:
914:Grenade launchers
443:DefenseReview.com
362:Pancor Jackhammer
228:
227:
99:Maxwell Atchisson
16:(Redirected from
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862:Anti-tank rifles
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618:. Archived from
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588:on July 23, 2011
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537:. Archived from
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413:Maxim Popenker.
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391:Business Insider
382:
357:List of shotguns
267:, or a 32-round
203:Feed system
91:MPS design: 2005
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35:
34:Atchisson AA-12
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738:Crane+, David.
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256:fully automatic
236:auto assault-12
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900:Type 99 cannon
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895:Oerlikon 20 mm
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890:Becker Type M2
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869:Oerlikon SSG36
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694:The New Yorker
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541:on 2009-07-18.
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470:Defense Review
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104:Specifications
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59:combat shotgun
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905:MK 108 cannon
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793:on 2011-09-02
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622:on 2021-11-07
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68:United States
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963:Sterling SMG
795:. Retrieved
791:the original
781:
769:. Retrieved
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748:. Retrieved
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722:. Retrieved
718:
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697:. Retrieved
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672:. Retrieved
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648:. Retrieved
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624:. Retrieved
620:the original
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590:. Retrieved
586:the original
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561:. Retrieved
559:. 2009-04-03
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539:the original
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513:. Retrieved
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474:. Retrieved
472:. 2005-03-11
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446:. Retrieved
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418:. Retrieved
394:. Retrieved
390:
380:
332:
325:
309:
293:
282:
261:box magazine
239:
235:
231:
229:
208:box magazine
206:8 rounds in
161:API blowback
130: length
96:Manufacturer
883:Autocannons
797:2 September
771:2 September
592:October 27,
263:, 20-round
983:Categories
750:2019-09-12
724:2020-10-20
699:2020-10-20
674:2022-05-14
650:2022-05-14
626:2019-09-02
563:2021-03-08
535:BusinessTN
515:2023-04-09
476:2021-03-08
448:2020-10-21
396:2021-03-08
373:References
306:Ammunition
222:Iron sight
921:Daewoo K4
557:New Atlas
300:open bolt
144:Cartridge
56:Automatic
940:Shotguns
420:April 5,
367:Saiga-12
341:See also
312:buckshot
149:12 gauge
86:Designed
78:Designer
289:FRAG-12
279:History
249:USAS-12
244:shotgun
645:SOFREP
510:SOFREP
271:. The
218:Sights
156:Action
128:Barrel
117:Length
968:TZ-45
466:(PDF)
322:Usage
316:slugs
232:AA-12
799:2011
773:2011
745:news
594:2018
422:2012
314:and
230:The
109:Mass
52:Type
853:APT
296:CQB
985::
742:.
717:.
692:.
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643:.
614:.
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555:.
533:.
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430:^
405:^
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831:e
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234:(
20:)
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