Hey Guys, Kind of nubie question here. Other then actually burning up ammo what is the best way to determine if the lips on AR mags are out of tolerance? I have something like 8 30 round Colt stamped AR magazines that I inherited that have been kept loaded for about 4 years and I'm concerned about the lips being out of tolerance. I did a quick search and could not find any links to specs or anything else that looked helpful. I appreciate any advise you guys could give, thanks.