A product demonstration of the WE Airsoft Hi-Capa 5.1R Auto Black GBB Pistol Quick Demo airsoft gun. This semi/full auto GBB pistol can be powered by CO2 or green gas, has a length of 22cm, and uses 6mm BB pellets. The magazine holds up to 30 rounds, and the gun has an adjustable hop-up system. Its performance is listed with an FPS range of 90-100 and a caliber of 6mm.