The machine gun used in the shootouts is the Kulsprutepistol m/45 (Kpist m/45), also known as the Carl Gustaf M/45 and the Swedish K SMG, is a 9mm Swedish submachine gun (SMG) designed by Gunnar Johnsson, adopted in 1945. The extension on the end of the barrel is a blank adapter which allows the machine gun to be fired at full automatic.