The .50 caliber Umarex Hammer Air Rifle didn't alter the laws of physics. We just took advantage of them. The Umarex Hammer's primary objective was to accelerate a greater mass faster using technology, ingenuity, and that big .50 caliber pellet. This unparalleled air rifle will push a 550 grain pellet to 760 FPS and generate 705 ft-lbs of energy. Unlike a traditional firearm, the Hammer air rifle doesn't generate a comparable report or recoil signature. A shooter in a hunting situation will not need to wear hearing protection when shooting the Hammer air rifle. The recoil of this air rifle can best be described as a firm push, not a sharp kick. The Umarex Hammer air rifle is not just another air rifle. It's in a class all by itself.