Stern Defense , Stern 001-sd Mag-ad9-glock-9and40-m-001SDMAGAD9GLOCK9AND40

Convert your standard Mil Spec AR 15, M4, M16 lower assembly to use 9mm and.40 s&w glock magazines. The mag-ad series adapters install in seconds. Boasting a last round hold open feature making them a breakthrough product and a must-have for law enforcement and civilian gun enthusiasts alike.

Caliber: 9mm/40 S&W
Finish: Type 3 Hard Anodized
Material: Aircraft Grade Aluminum