
I'm trying to get it to work in my G&G GK99 (replica of a Valmet, but the receiver is the same as any other G&G blowback AK). The problem I'm running into is that there is very slightly too much travel back and forth, the mag does not seat quite right and will not feed. When I hold the mag and pull it firmly backwards (towards me when the gun is shouldered), it feeds inconsistently but drops BBs when the mag is released (as it should).
I brought the gun to AONW on Saturday and Childs and Abe there recommended adding material to the magazine to make it fit more tightly at the back. I tried it by shimming first the mag, then the top of the mag release with thin strips of electrical tape, which did not make too much of a difference. 1 strip of tape made no difference, 2 strips made it so the mag wouldn't fit in at all.
The other recommendation I received from a teammate was that I could try dremeling part of the mag where it locks in to the magwell, the theory being that the mag sits too snugly in some areas which makes it seat crookedly. I used my knife to file down the tabs first on the front and then on the back, and once again, it did not seem to make a significant difference.
Does anyone have any experience with these mags and has run in to similar trouble? Is there something about G&G AKs being picky with mags that I don't know about? Otherwise, they are very nice mags and I'm reluctant to part with them, I'd really like to make them work if I can.