Saw Ed-Skar's Video (https://www.youtube.com/watch?v=CtM0y7NatIY) on modifying the vorpal mags to make assembly easier and thought it was a great idea. I modified the feedlips and 20 round body since that's the one I use. The indent is 1.5mm, that combined with the screenshots should be enough for anyone to modify the other body pieces to match.