HK USP Gas Gun CO2 NBB Color:Black Fits the M4 electric AEG

Fits the M4 electric AEG rifles by KSC

Olive Drab Green

front-battery mounted style

Once the laser is sighted in and adjusted correctly

an internal zippered pocket and a separate divided compartment for a hydration bladder

HK USP Gas Gun CO2 NBB Color:Black Fits the M4 electric AEGHK USP Gas Gun CO2 . A full sized HK USP non blowback (NBB) CO2 airsoft gas pistol. From Elite Force HK. 360 FPS w . 20g BBs. Uses HK USP Co2 non blowback magazines only. Mostly plastic, but a great little shooter that's super gas effecient. Umarex 2275023 and 2262030 Comes in black and tan black color options. 360 FPS w . 20g BBs Uses standard Co2 cartridges in its magazine.