Stern Defense 001SDMAGADMP9AND40/P32 Mag-AD9 9mm/40 S&W Fits Sig P320/P250 Black Aircraft Grade Aluminum

Convert your standard mil spec AR 15, M4, M16 lower assembly to use 9mm and .40 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. Made of lightweight aircraft-grade aluminum with a built-in ergonomic mag release. Requires a 5.4 oz buffer or heavier when using a carbine spring. CNC-machined from 6061-T6 aluminum, 4140 NiB-coated feed ramp, hard coat anodized (Type III) for maximum wear resistance. Fully compatible with M&P, Sig Sauer P320, and P250 magazines. Made entirely in the USA.