The Stern Defense Mag-AD 9mm/.40 S&W Glock Magazine Adapter is their flagship product, allowing you to quickly convert your standard mil-spec AR-15, M4, or M16 lower assembly to accept Glock 9mm and .40 S&W magazines. The adapter boasts a last round hold open feature, a breakthrough innovation that elevates the shooting experience—making it ideal for law enforcement and civilian gun enthusiasts alike.
Constructed from 6061 T6 aircraft grade aluminum with hard coat anodized type 3 finish, this adapter delivers durability and precision. The unit features machined aluminum construction with a 4140 NiB coated feed ramp and a rolling actuator bolt stop lifter for mechanical advantage. Installation takes seconds, and the ergonomic mag release makes operation intuitive. Compatible with all generations of Glock magazines and any mil spec AR-15 lower receiver, this adapter transforms your existing platform into a reliable pistol caliber carbine without permanent modifications.
