I might have a flat YOU can use Ill look . I just cut them form 4140 I get from air craft spruce
Its pretty easy to dedemple them if there not heat treated .
I just used a really big c clamp. I dont think I even used heart although you could . I did that on a 243 win build were I used G3 mags . ll post a link to some of the build if I can find it . It was pretty easy to make them flat an smooth .
DO cold steel solutions have demples ??? they old ones didnt I think .