Works with m&p 1522, sort of - Tippmann Arms Speed Loader

I bought this to try on my S&W 1522 mags. I had to install some shims to the inside of the mag tower to get rid of the excessive wobble. When it works out works great, but on a couple of my mags it actually spread the mag apart and i had to glue them back together. It is faster than the McFadden lighting loader when it works, but some times you have to baby the crank.