Suomi Mag Loader

I needed a mag loader for Suomi/Shockwave ZMAG-S31 mags. The ZMAGs are very similar in size to Sten mags but have a tab on the back meaning Sten loaders cannot be used. I modified Jebela's design to allow clearance for the tab on the back.

I will update the model as necessary.

R2 has been modified to allow for a little more clearance, ~4mm more, for the triangular shape of the ZMAG and has the tab that pushes down on the case narrowed about 1mm as it was interfering with the feed lips.