VFC Complete Replacement Gearbox w/ Spare Compression Kit for Heckler & Koch MP7 Series Airsoft AEG SMGs

"OK guys, my friend works at an airsoft store and i have to say that this stuff is impressive. We put it through a KWA LM4 and ran it on full auto for so many mags (WAY TOO MANY) that the mag started to malfunction due to how powerful it is. We were getting a solid two or three mags per fill which is pretty unheard of. Furthermore, it is winterized so us northerners don't have to deal with it not working for half the year. Great product.