The Gamo Wildcat Whisper Air Rifle features the Gamo Inert Gas Technology (IGT) piston to launch pellets for fast, more consistent shots. You'll notice that gas piston pellet guns are very smooth cocking, they function better in cold weather, and have a longer lifespan than traditional, metal spring powered guns. With speeds of up to 1350 fps in .177 caliber and 975 fps in .22, this gun is ideal for your small game hunting and pest control needs. And because this gun is outfitted with the Whisper Technology, this ultra quiet rifle is less likely to spook your quarry and more likely to hit your intended target. Smaller targets are easier to see with the included 4x32 scope.