Gamo 6110038654 Swarm Magnum 10X Gen 3, Gas Piston 177 10 Shot, Black Steel Barrel, Black Receiver, Black All Weather Lightweight Thumbhole Stock, Scope 3-9x40mmThe next generation Swarm air rifle features the 33 mm cylinder and the IGT Mach 1, allowing it to deliver power with 1,300 fps in . 22 caliber; SWA (Shock Wave Absorber) recoil pad with up to 74% recoil absorption and a non slip texture design on grip and forearm and 10X Gen3 inertia fed technology.