t4e ts 68Umarex has their super cool sawn off hunting rifle, the Tactical Shotgun TS 68, which has room for one shot in each barrel. The rifle has their smart Quick Piercing system, where you prepare the rifle with shots and CO2 When you are ready to shoot, you just have to "hit" the bottom where the CO2 is located and it will then pierce the cartridge and it can shoot, so it is not under pressure. It's a . 68 caliber There are 10 shots on a CO2 cartridge