I have one that has been flawless, and the other, just minor odds and ends. Yesterday, it was failing to lock open on an empty mag, about 3 times in 100 rounds. The gun has 3000+ rounds through it. I can mess with the mag and clear it up for awhile or cause something different, but I wouldn't call it junk for the range. I may eventually get some high end mags in the future, but for the range, I don't complain.