IMHO Mec-Gar mags are of the same high quality as factory Beretta mags. In fact in the early 80's Mec_Gar had a contract with the US military for 1 million mags. I have been using Mec-Gar 17 round 92 and Mec-Gar 12 round 96 mags for thousands of rounds and have NEVER had a FTF or FTE and they always lock the slide back after the last round. The problem is the Mec-Gar mags cost just as much as factory Beretta mags most of the time.
I also have some of the Asain Military mags and while the metal the bodies are made of is much thinner and the paint on the follower and base plate leaves much to be desired I have never had a problem with them either but I wouldnt use them for self-defence.
These are the only two after market mags I would spend my money on. IMHO USA, TripleK, RamLine are junk and should be avoided. The old saying of getting what you pay for could never be any truer then when talking about pistol magazines.
BKVic