The Umarex High Power Pistol (HPP) BB Repeater pistol has a 15-shot drop-out magazine for quick reloading. The 410 FPS velocity is quite high for the class of pistol. The blowback action simulates a real firearm. The heavyweight construction of the pistol and integrated accessory rail give it the look and feel of realism. A housed CO2 cartridge in the pistol grip provides the power for the heavy duty gun.