HK MP7 A1 Advanced - Spring Gun VSR-10 Parts The Hopup Chamber EVO unit

The Hopup Chamber EVO unit is designed to accept the 18

Dimension – 140 x 72 x 26mm

or tactical training

will require you to do some gearbox work and soldering but will allow you to take full advantage of the Features of this awesome Mosfet

HK MP7 A1 Advanced - Spring Gun VSR-10 Parts The Hopup Chamber EVO unitThe airsoft HK MP7 A1 Advanced Spring Gun is an airsoft economical plastic spring gun by Heckler & Koch (Umarex licensed). This is a manual loading spring firing gun, meaning you have to pull the front forward grip back for each shot you fire (spring powered) it's very easy to pull back and fire for each shot. No battery or gas required. Very reliable and a lot of fun to shoot. This is more of a backyard plinker and not meant for serious airsoft field