Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4107321.

The original model by jwebst didn't work on at least the 9mm mags. The push post was too thick to allow the next round to insert sufficiently into the magazine and hold itself in place. This version trims that post down significantly and moves it back further, allowing the round to seat in place before releasing the mag loader.

Additionally, I've added an access hole at the back of the mag loader to allow a stuck round to be pushed out and ejected (should be a rare case with this modified version)

This thing was remixed with Tinkercad. Edit it online https://www.tinkercad.com/things/7ARD9vFP4Ny