Beretta PX4 Storm .177 Caliber Blowback BB Gun Pistol, Shoots Pellets and BBSThe Px4 Storm air pistol is not only a BB pistol but a pellet pistol as well. It will shoot either projectile from its revolutionary dual ended magazine. This 16 shot repeater will have you shooting as fast as you can pull the trigger. There's an 8 shot rotary clip on one end of the stick mag, and another one at the other end. Since it shoots BBs or pellets, you'll have more flexibility with ammo choice. Fires . 177 Caliber Steel BBs or Pellets Shoots