This is interesting:

You’re going to need a 9mm or .40 compatible upper assembly obviously for this to work, but this is pretty cool.

0:21 – hahah I lost it when he did the cutting with a karambit.  I don’t know why, but I always associate those knives with guys who wear fedoras and have transition lenses in their glasses.  I know some guys aren’t going to like the idea of cutting their Glock mags, but worst case scenario you can dedicate a couple mags to just this setup.

Coming summer 2017  – $75 MSRP according to the website.  Thoughts?