Bringing a Heckler & Koch MG4 to the airsoft field is a lot of firepower, provided that it comes with a box magazine. Airsoft Atlanta got the Elite Force HK MG4 Box Magazine and it has a 4,000-BB round capacity... "The HK MG4 Box Magazine is a direct replacement or spare 4000rd box magazine for the Elite Force HK MG4 AEG LMG.

Made by Elite Force/VFC."