TOP GUIDELINES OF RUGER P89 FOR SALE

I'm also experimenting with modifying some M&P mags and CZ mags to employ inside the carbine. You should cut the notch inside the front of your mag so it'll lock in. I don't personal any Glocks.I would use Glock branded Publications and never the other copies. Some others can be found such as Magpul. You could potentially consider some and find out