My only thing I have found so far I do not like. The bolt does NOT lock back after the last round is fired. Unless I'm actually counting the rounds fired I'm pulling the trigger on an empty mag a lot. Not to mention a lot of my mags have the Chip McCormick springs and followers so that some of my mags hold 9 rounds. If the mags are already loaded I can't tell if I just stuffed an 8 or 9 round mag in.
