The GAMO Swarm Whisper pellet rifle features 10X Quick-Shot patent pending technology that utilizes a 10-round rotary-style magazine, providing faster loading for repetitive shooting. This air rifle also features the IGT (Inert Gas Technology) piston that allows higher velocity, less vibration and a longer lifespan than the traditional spring-powered airguns. The GAMO Swarm Whisper also features the well-known patented Whisper noise dampening technology. Features: Up to 1,300 fps (.177 Cal.) using Gamo PBA Platinum pellets, IGT (Inert Gas Technology) piston, Whisper noise dampening technology, two-stage trigger, single cocking break barrel, automatic cocking safety system, manual trigger safety, fluted polymer jacketed steel barrel, and a 4x32 shockproof scope with rings.Features :Caliber: 0.177Action: 10X Quick- Shot technology enables you to shoot up to ten pellets without reloading. Single cocking system.Powerplant: IGT Inert Gas Technology gas piston.Trigger: Two stage trigger.Safety: Manual safety and automatic cocking safety system.Ammunition: Any .177 Cal. Pellet.Barrel Length: 19.1 in.Velocity: 1,300 feet per second (fps) with PBA Platinum.Noise Dampening: WHISPER