Originally Posted by MaciekA
Does the G&G have trouble with TM mags?
I have had trouble with TM mags with G&G before, like with their MP5 (took MAG brand just fine).
I bought some chinese 100 round midcaps (probably OEM for MAG, or similar to MAG anyway) and I had to file them down a bit to get them to slide in smoothly. No work was needed on the BB port at all though, other than just lubing the spring/follower with a little silicone oil.