I am also experimenting with modifying some M&P mags and CZ mags to make use of inside the carbine. It's important to Slash the notch in the entrance with the mag so it will lock in. I don't own any Glocks. Not poor, but taking into consideration the amount manufacturing https://damienehgea.thekatyblog.com/31102780/helping-the-others-realize-the-advantages-of-ruger-sr45-for-sale