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.

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 or 40S&W barrel, "depending on chosen caliber" and a Glock cut bolt.

Specifications:

• Made in the U.S.A.
• Constructed from 6061 T6 aircraft grade aluminum.
• 4140 NiB coated feed ramp.
• Hard coat anodized type 3.
• Sturdy Construction.
• Ergonomic mag release.
• Works with all generations of M&P magazines.
• Works with P320 and P250 magazines
• Works with any mil spec ar15 lower receiver.
• All gun components besides the Bolt and Barrel remain stock