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Convert your standard AR 15, M4, M16 lower assembly to use Glock, M&P or Beretta 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 Glock cut bolt.

Already have a Colt Style bolt and want to use our system? We've got your 6.
Glock Cut Service