Hi capa 5.1 baseplate

should print fine as is, if your printer is good with overhangs and has good cooling. no supports needed. confirmed to fit on army armament and WE mags, dunno about any other mags. has a matrix on the bottom to mark your mags with a paint pen or something. also is a bit shorter than stock mags and has a nice cutout to make it easier to yank mags out, works well with a magwell.