Inusuit
Well-known member
I have a fairly new Zastava Serbian M57 in 7.62x25. It came with two magazines. When fully loaded, one magazine will release and drop about 1/4 of the way out of the butt after a couple of shots. Does the same thing when dry fired. If loaded with fewer than 7 rounds or not loaded at all, it won't unlock when dry fired. I can see no difference in the retention slot in the magazine bodies. The other magazine works fine loaded or unload, live fire or dry fire. I'm stumped. Any ideas? It's too late to return the magazine.