This is a Gamo known as the Swarm Whisper chambered in 22PEL, model 611006875554.
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 975 fps (.22 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: 0.22
Action: 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 .22 Cal. Pellet.
Barrel Length: 19.1 in.
Velocity: 975 feet per second (fps) with PBA Platinum.
Noise Dampening: WHISPER
Rail: GAMO standard 11 mm aluminum rail.