Stern Defense AR-15 Magwell Adapter for S&W M&P, Sig P320 9mm Luger Magazines Black

This Stern Defense AR-15 Magazine Well Adapter will convert your standard mil spec AR 15, M4, M16 lower assembly to use 9mm S&W M&P and P320/P250 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. The Stern MAG-AD series adapters are made of aircraft grade aluminum, lightweight with ergonomic design. Note: These adapters require the use of a 9mm barrel, "depending on chosen caliber" and a Glock cut bolt. Features Constructed from 6061 T6 aircraft grade aluminum 4140 NiB coated feed ramp Hard coat anodized type 3 Sturdy Construction Ergonomic mag release Works with any mil spec ar15 lower receiver All gun components besides the Bolt and Barrel remain stock