The Mauser HSc is probably more reliable than the average pocket pistol but don't expect too much of it. They stopped making the HSc a few years after the war because it never could live up to it's main rival, the Walther PPK, in terms of reliability. In my opinion it was overly complicated at the expense of reliability with too many parts serving dual purposes. The one I have doesn't make it through a box of 50 rounds without a jam (usually a feeding problem). But then again, you may be lucky and yours may work much better. Try it and see. If you can put a couple of hundred rounds through it without a problem then it's a keeper.