These mags are really nice. They feed well into my ASGI G4-A1 11" SPEC V Custom. Some of them needed some lubrication, which is expected, but I lubed them all anyways.
I barely have feeding problems. I've only had one incident of a problem, and that was when one mag wasn't fast enough to keep up with my 9.6, but it only dry fired about seven times out of 120 BB's, which isn't bad at all.
It'd be really cool if these were metal... But hey, at $6.50 per mag, I'm not complaining at all.
-A good plastic. A really good plastic.
-Fairly large capacity for a mid cap
-Slight problems with feeding. Only happened once though, and with one mag. Haven't had any other problems yet.
Rating: [4 of 5 Stars!]