The Mecgars worked OK in mine. I think I bought two or three, so that is not much of a sample, but I haven't heard anything bad about them other than the usual "they're not original" gripes. (Of course they're not "original." ) Most people seem to be glad to have a reliable source.

I don't think I would carry the piece loaded and on-safe, though I do the same thing with 1911s and don't give it another thought. I'll be interested to see what others with superior knowledge say about that. As to durability, the design does have weaknesses. My gun managed to come to grief within the first 100-rounds or so. My impression is that it might be best to take it easy on the Mauser.