Bersa Thunder 9 PRO pistol Uses a 12-gram CO2 cartridge Semiauto Removable 19rd BB stick magazine Fixed 3-dot sighting system Weaver/Picatinny accessory rail Threaded muzzle No blowback Includes gun, 1,300 steel BBs, extra magazine, 5 CO2 cartridges and an ASG fake compensator Includes Bersa Thunder 9 PRO pistol, steel BBs, CO2, fake compensator and an extra mag 0.177 400