Tag Archives | Stern Defense

Stern Defense MAG-ADMP9&40/P320 – Make a Standard AR-15 Lower Accept M&P or P320 Magazines

If you are a fan of pistol caliber carbines and the Sig P320, this should be good news…

Stern Defense’s updated MAG-ADMP9&40 now accepts Sig P320 magazines in addition to S&W M&P magazines. This mag adapter installs in any standard AR-15 lower in seconds for use with a pistol caliber upper (9mm or .40 S&W). The MAG-AD provides last round hold open and an easy to reach magazine release button.


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