Well.....er'......yep, M2 mags can be modified to work in an M1. Just as GFB said, you've got to make a 'new' M1 latch hole in your M2 mag. I don't use a dremel, rather, I use a drill press and a jig to drill a small hole in the approximate location....meaning just an rch low. THEN, I use some tiny files to square the hole up...raising the top portion of the hole an rch, then insert the mag to see if its latching in. If it doesn't latch, I'll take another rch off the top of the hole and insert the mag again....keep doing that until it latches in. THEN it'll probably have the mag latched in a little high, so some careful eyeballing, checking standard mags, measuring, etc. and maybe take another rch off the top of your new hole.Heard a guy on here had a fix? Search so far not working...Will the real Danny William's please stand up..