The Atchisson .22 submachine gun was an American small-caliber submachine gun designed by Maxwell Atchisson and produced in prototype form only.
Overview[]
This was a .22 caliber submachine gun designed by American firearms inventor Maxwell G. Atchisson. Not much is known about the weapon. It could be fed through a box magazine or a 70-round drum magazine. The intended usage of the weapon appears to have been for training purposes. Only one photo of the weapon has survived.