Submited By: Frank B. on 05/19/2011 I bought this to upgrade, of course, a Version 7 gearbox for a custom project I'm doing. The base gun was an old CYMA or AGM M14, and some of the parts didn't fit quite right, and required a little dremel work, and it now functions fine. The only REAL problem I had was that the spur gear was too small. It didn't come into contact with the other two gears. This may be because it's meant for G&P or real Tokyo Marui gearboxes. Aside from being stuck with a stock spur gear, this is a quality product. | |