Powered by the enhanced IGT Mach 1 inertia-driven gas piston power plant with a monster 33mm cylinder, the Gamo Bone Collector 10X Gen3 launches pellets up to 1,100 FPS with greater precision, less vibration, and true knockdown power. But there's more to the Swarm than just devastating power and penetration. It also comes equipped with the outstanding CAT (Custom Action Trigger), high-grade beechwood stock, and Whisper Maxxim technology with dual noise-dampening chambers that makes it the quietest Gamo Air Rifle available. Designed in collaboration with Michael Waddell and Travis inchT Bone inch Turner of the Bone Collector TV series IGT Mach 1 Inert Gas Technology gas piston power plant with 33mm cylinder delivers superior power along with 1,100 FPS velocity 2-stage independently adjustable Custom Action Trigger allows you to adjust both the first and second stage 10X technology allows you to shoot 10 pellets without reloading Whisper Maxxim technology features 2 noise-dampening chambers and an improved muzzle brake design High-grade beechwood stock with checkering Metal-jacketed rifled steel barrel Shock Wave Absorber recoil pad 11mm Recoil Reducing Rail for optics Includes (1) 10-rd. rotary magazine