NOT KNOWN FACTUAL STATEMENTS ABOUT RUGER SHOTGUNS

I'm also experimenting with modifying some M&P mags and CZ mags to utilize from the carbine. You must Slice the notch during the entrance with the mag so it will lock in. I do not own any Glocks.I'd personally use Glock branded magazines instead of another copies. Others can be obtained including Magpul. You could try some and find out on your own.