The KR-9 is a U.S. manufactured 9mm semi-automatic AK style rifle. It is based on the Russian Vityaz-SN submachine gun, has a 16.25" barrel and accepts 30 round double stack Kalashnikov USA magazines. The KR-9 comes with a skeletonized style metal side folding stock, hinged top cover with attached Picatinny rail. and a .5 -28 threaded flash suppressor.