B&T USA TP9-N, Semi-automatic, Pistol, 9MM, 5.1 Barrel, 25mm 3-Lug, Matte Finish, Tan, 30 Rounds, 1 Magazine BT-30105-N-US-CT The MP9 represents the latest advancement in personal defense weapons. The MP9 is the world's lightest 9 x 19 mm select-fire weapon, ideal for surveillance teams, vehicle crews, CQB, SWAT teams and as a PDW, surpassing all other submachine guns in size, weight, and flexibility. This advanced, ambidextrous weapon is also available in semi-automatic only operation for the civilian market as the TP9.