Gamo Whisper Fusion Mach-1 .177cal IGT Powered Air Rifle with Scope The GAMO Whisper Fusion is powerful, quiet and accurate. The IGT MACH 1 gas piston delivers higher muzzle velocity, less vibration and smoother cocking. It also features Whisper Fusion technology, the quietest noise reduction technology patented by Gamo. Caliber .177 Velocity: 1,420 feet per second (fps) with Alloy Pellets Action: Single cocking system. Noise dampening: WHISPER FUSION Powerplant: IGT Mach 1 Inert Gas Technology gas piston (33 mm cylinder) Barrel: Fluted polymer jacketed rifled steel barrel with WHISPER FUSION noise dampening technology. Trigger: Two stage independently adjustable CAT (Custom Action Trigger). Stock: Automotive grade glass filled nylon all-weather. Checkering: Non-Slip texture design on grip and forearm. Recoil Pad: SWA (Shock Wave Absorber) Recoil pad with up to 74% recoil absorption. Safety: Manual safety and automatic cocking safety system* Optics: GAMO 3-9A-40 air rifle scope with rings (shockproof, fogproof) Rail: 11 mm aluminum rail, RRR (Recoil Reducing Rail). Sights: Adjustable windage and elevation fiber optics rear sight., Fiber optics front sight Weight: 6.61 lbs. Length: 46 in. Length of Pull: 14.2 in. Ammunition: Any .177 Cal. Pellet. Trigger Pull: 3.2/2.6 lbs. Barrel Length: 20.5 in. Cocking Effort: 32 lbs.