M4 to MP5 mag converter

thingiverse

This design began taking shape in Tinkercad, but it wasn't until outside the printer that the refinements really kicked in. I had to get out my trusty tools - a file, some sandpaper, and a handful of wood spacers - to ensure a seamless fit. To replicate this level of precision, you'll need to do the same with your M4/M16 or MXC. Once assembled, it will be secured with a strong adhesive, which mine held surprisingly well after being super-glued in place for 5 hours against the mag well's right wall - the ideal spot to apply glue. With the basics covered, I'm more than happy to print another copy and even create a tutorial video if you're interested! The clever use of a pencil spring and an old ink cartridge component helped me achieve just the right amount of leverage for the lever.