Stern Defense AR-15 9mm/40 S&W Magazine Adapter

Upgrade your AR-15 with the Stern Defense AR-15 9mm/40 S&W magazine adapter. Made in the USA from 6061 T6 aircraft-grade aluminum, this adapter allows you to use S&W M&P and SIG P320/P250 magazines with any mil-spec AR-15 lower receiver. Featuring a 4140 NiB coated feed ramp and hard coat anodized type 3 finish, it ensures robust performance. The ergonomic mag release and compatibility with all generations of M&P magazines make it a versatile choice. Note: Requires a 5.4-ounce buffer or heavier and a Glock cut bolt.