
The original design was the basis of several later weapons, including the USAS-12 combat shotgun. The current 2005 version has been developed over 18 years since the patent was sold to Military Police Systems, Inc. The most prominent feature is reduced recoil.


The Auto Assault-12 ( AA-12), originally designed and known as the Atchisson Assault Shotgun, is a shotgun developed in 1972 by Maxwell Atchisson. 7.3 kg with loaded 32-round drum (original version)Ĩ rounds in box magazine, 20 or 32 rounds in drum magazines Maxwell Atchisson, further developed by Military Police Systems, Inc.ĥ.2 kg less magazine.
