Sorry I shouldn't have said the finishing on the Corwin mags is subpar, I meant the design. Yes they work, and if you are really struggling on a budget to afford mags for your gun, they work. The design however is the old style design that seems to have had an attempt to make it more current by changing the cutout on the spine up at the feedlips. Instead of the normal square cut for the slide to move through and strip a round, it's been made semi circular instead. But it looks like it was done by hand after the fact. On the 2 samples I was sent neither was the same shape and very rough. As well they have the old thin sheet metal basepads which can be hard to find replacements for if you're wanting to put something a little easier to grab on them.