UMP45 magazine loader

I basically copied the design and function of many pistol magazine loaders that come with the guns when you buy them new. It slips on over the top of the magazine and it helps you press the rounds down into the mag as you insert another round. I printed with 100% infil, using PLA CF. go crazy with it and see how you like it. I know for a fact it will work with the 45 cal mags, I imagine it will work with the 40, but 9mm UMP mags might have feed lips that are too narrow, I don't have a 9mm UMP to check.