The KP-9 is a U.S. manufactured 9mm semi-automatic AK style pistol. It is based on the Russian Vityaz-SN submachine gun, has a 9.25" barrel and accepts 30 round double stack Kalashnikov USA magazines. The KP-9 has a hinge block with a quick detach swivel mount and is SBR ready. This makes it a must have for the individual that would like to be able to shoot while waiting for their SBR paperwork to be approved by the BATFE, or for someone that just really doesn t desire the extra length the stock and barrel of the KR-9 add to the platform. It comes with a hinged top cover with attached Picatinny rail and a .5"-28 threaded flash suppressor.