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Isaiah, sure Sir. The Jack9 Gen2 Pistol Caliber AR-15 Stripped Lower Receiver 9mm Luger Multi Caliber Marked Uses Glock Style Magazines. Cheers!

This lower is compatible with Glock mags. They don't currently have a version that accepts colt mags. Full specs on sharps website here. https://sharpsbros.com/jack9-9mm-40-s-w/

Isaiah, this lower is compatible with Glock magazines. Hope this helps.