The Umarex T.A.C. is an air pistol that converts into a carbine using the included frame. It’s chambered for .177 caliber pellets with a 19-shot capacity and is powered by a single 12g CO2 capsule housed in the grip. With a 4.25″ barrel the T.A.C. is capable of a velocity of 410 FPS. In addition, with the use of adapters, the HK USP (Airsoft & BB), SW MP40 BB, Umarex XBG, Combat Zone Enforcer, and Walther P99 DAO Airsoft can use the T.A.C. carbine frame.