I'm also experimenting with modifying some M&P mags and CZ mags to employ in the carbine. You will need to Slash the notch in the entrance of your mag so it will eventually lock in. I do not individual any Glocks. Should you had a substantial pre-current retail outlet of https://ruger-shotguns28110.blogdemls.com/31937497/ruger-sr45-for-sale-an-overview