Magazine loading assist for 12GA magazines. Tested with stock Panzer Arms 5 round 12GA mags, Rock Island Armory 9 & 19 round 12 GA mags. No others available to test yet but it should work on most 12ga AR style magazines.

You will need supports for the center pusher mechanism. I recommend tree supports if your slicer supports it. Also use as many walls as is needed for your model to be solid for the walls, no infill on the outer walls is recommended but shouldn't add time if you just print more walls.