Stern Defense 001SDMAGAD9GLOCK9AND40 Mag-AD9 9mm/40 S&W Fits Glock Black Aircraft Grade Aluminum

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.