I am also experimenting with modifying some M&P mags and CZ mags to employ in the carbine. You need to Slash the notch in the front on the mag so it is going to lock in. I don't have any Glocks. oil on everyhting else. When I delivered mine to https://connerntafg.blogocial.com/5-essential-elements-for-ruger-sr45-for-sale-68029174