The Hatsan Hydra QE Air Rifle is a high powered modular bolt action air rifle. The Hatsan Hydra features a Quattro trigger and a QuietEnergy fully shrouded barrel and integrated sound moderator which is approximately 50% quiter. Includes 11mm and 22mm combo scope rail for scope mounting. This airgun has a premium Turkish Walnut stock with ergonomic grip and Monte Carlo cheek piece. Also features Versi-Cal Technology allowing your to interchange barrels for use with different calibers. Includes Fixed 165cc volume aluminum air cylinder.