I'm also experimenting with modifying some M&P mags and CZ mags to employ within the carbine. You should cut the notch while in the front from the mag so it will eventually lock in. I don't possess any Glocks. oil on everyhting else. After i shipped mine to Ruger for https://josueqacby.mpeblog.com/56672795/fascination-about-ruger-shotguns