The Swarm Viper features an automotive grade glass filled synthetic stock with rubber inserts on the forearm, grip and cheek piece. The magazine indexes using the inertia force from the recoil of the air rifle creating a smoother and more precise breech-loading process. This air rifle features an glass filled nylon all-weather stock, finished with premium rubber inserts for the grip, forearm and cheek rest. The Swarm Viper 10X GEN3i .177 features the integrated Whisper Maxxim sound suppression technology. The Inert Gas Technology (IGT) gas piston delivers steady and consistent power. This pellet rifle incorporates GAMOs CAT (Custom Action Trigger), a two-stage adjustable trigger. GAMO designed the Swarm Viper 10X GEN3i with the Recoil Reducing Rail that maximizes the scope lifespan. Every air rifle includes 10 shot magazine.