Alternative bottom part for 1911 CobraMag withpPicatinny rail

Since the supplied magazine bottom from Mantis didn't fit my CobraMag(9mm), I designed this alternative bottom piece. I added a picatinny rail so I can mount my mantis to these magazines.

It was designed to fit a 9mm 1911 CobraMag and worked perfectly with my Mantis X. The first time the tolerances can be tight but it should fit.