Hi,
Mec-Gar used to make Walther factory mags as well as Kel-Tec, NAA, SIG, Beretta, and a variety of other guns mags--check their website. I have them for my Walther PPK in.32ACP and .380ACP and they work great--never had a problem. My guns are from the 1960's and I've never had a problem.