This HK45 CO2 BB air pistol shoots BBs at 400 FPS and includes a 20 round magazine for semi-auto operation. This is the authentic licensed replica of the popular HK45 firearm. - Drop-free 20-shot magazine - CO2 powered steel BB pistol - Ambidextrous magazine release - Fixed front and rear sights - Picatinny style accessory rail - Semi automatic repeater - Full metal barrel and slide