I would advise against using Erma or post war Mauser mags. Both are no longer made, Erma is bankrupt and the Dutch company that made them for Mauser has gone bankrupt so many times they don't know their own name anymore.
Apart from that, the bottoms of the Mauser magazines shatter quite easily and both Erma and Mauser are becoming more collectable.
So stick to MecGars for shooting, I'd say
