Umarex TAC Air Pistol -What do you get when you combine the Umarex TAC Converter and an Umarex XBG? A Tactical Carbine with a folding fore grip and folding butt stock. Add all kinds of accessories to its plentiful tactical railing before pulling the trigger on this pistol conversion that holds 19 rounds in its drop free magazine. Velocity: 410 fpsCaliber: .177Barrel Length: 4.25inTotal Length: 14 to 22.5 inchesCapacity: 19Action: Double RepeaterPower: CO2Trigger Action: Double