S&W MP 9 Mag Loader

Saw a 9mm blank gun loader for a single stack magazine and used the idea to create a similar one for S&W double stack mags (https://www.thingiverse.com/thing:3379178)

Fits a little tight on some mags so you may need to do some fitting on the inside (or let it wear in).

You will need a spring and a roll pin or screw to complete

Spring:
https://www.amazon.com/dp/B005S4ES6A/?coliid=I3TSV4ZO8D3YAT&colid=2ZNJJSAX5VR6G&psc=0&ref_=lv_ov_lig_dp_it

For the roll pin, use a 1/4" #10 or M5 but