This mag came in the box with my GR15, and i thought that it preformed exceptionally. I have experienced absolutely no doublefeeds, missfeeds, or jams while using this mag. Normally, due to its very high capacity, I can get 2 rounds out of it per game. Sometimes one, I am very trigger happy :). the mag is metal, and can be easily disassembled by unscrewing an allen screw at the bottom and sliding off the bottom plate. I think this is overall a great mag.
Very little wobble in my G&G
None so far for me, but im not very picky.
The mag might be a little heavy to some players' standards.
Wobbles in my friends SCAR
Rating: [5 of 5 Stars!]