|I have never had any trouble with Tapco. Especially no problems with these magazines! They all fit and function fine in my zastava m70. For increased reliability and lifetime, i sprayed the inside of the mags with a drilube to reduce friction between the follower and the mags sides. These are cheap in cost, not in quality! With the way things are going in this country, i think buying an extra 2 or 3 of these is a great idea. Hell, I bought 10!