you can run mdt mags in ctr bottom metal with about 3 minutes with a sanding block. magpul work as well but you either need to open up the receiver on the bottom or take down some of the width on the feedlips on the mags.
don't see why you'd run aics bottom metal unless you wanted to run metal aics 5 rounders expressly.
Last edited by Ndbowhunter; 04/23/21.
