Adjustable

The upgraded spring guide

It features 4 gatling style rotating barrels and fires up to 550 feet per second at up to 25 rounds per second

the upper and lower receiver are CNC aluminum

as a possible future replacement for aged Sa

HK USP CO2 Blowback Magazine polar star AdjustableAn 18 round magazine that holds airsoft BBs and is made for the Heckler & Koch USP CO2 powered blowback airsoft pistol. Notes: The Elite Force HK USP blowback pistol 2275043 accepts this magazine. This magazine can be rebuilt using repair kit SKU number 2211173. 18 Round magazine full metal. Uses Co2 cartridges. High quality metal construction Heavy weight design to simulate the weight of a real loaded magazine High tension steel spring for reliable