Stern Defense MAG-AD9 Glock Magazine Adapter
Drop-in adapter that converts a mil-spec AR-15 lower to post-2004 Glock-pattern 9mm magazines for simple-blowback AR-9 builds.
- Price
- $180
- Brand
- Stern Defense
- Category
- Lower Parts
Featured in
Features
- •Mil-spec AR-15/M4/M16 lower conversion
- •Post-2004 Glock-pattern 9mm magazines
- •6061-T6 aluminum body
- •Steel nickel-boron feed ramp
- •Last-round bolt hold-open
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Stern Defense MAG-AD9 AR-15/M4/M16 Magazine Conversion Adapter, Glock, 9mm/.40S&W, Black, 001-SD MAG-AD9-9AND40-M
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Overview
The Stern Defense MAG-AD9 locks into a mil-spec AR-15, M4, or M16 magazine well and converts it to use post-2004 Glock OEM magazines with square magazine-catch notches. Its 6061-T6 aluminum body contains a steel feed ramp with a nickel-boron finish and a last-round bolt hold-open system.
This is a simple-blowback conversion, not a universal AR-9 adapter. A 9mm build needs the correct barrel, a Glock-cut bolt, a carbine spring, and a buffer weighing at least 5.4 ounces. Glock G26 and G27 magazines are too short, and Stern lists the adapter as incompatible with CMMG Radial Delayed Blowback and Olympic Arms systems.
Key Features
- Installs in a mil-spec AR-15, M4, or M16 magazine well
- Uses post-2004 Glock OEM magazines with square magazine-catch notches
- 6061-T6 aluminum adapter body
- Steel feed ramp with nickel-boron finish
- Built-in last-round bolt hold-open
- Requires a Glock-cut 9mm bolt, correct-caliber barrel, carbine spring, and 5.4-ounce or heavier buffer
- Not compatible with CMMG Radial Delayed Blowback or Olympic Arms systems
Pros
- +Converts an existing mil-spec AR-15 lower without a dedicated PCC lower
- +Adds a last-round bolt hold-open to the conversion
- +Uses common post-2004 Glock-pattern 9mm magazines
Cons
- −Requires a Glock-cut bolt and a simple-blowback operating system
- −Glock G26 and G27 magazines are too short
- −Does not work with CMMG Radial Delayed Blowback or Olympic Arms systems
Detailed Specifications
- Manufacturer SKU
- 001-SD MAG-AD9-GLOCK-9AND40-M
- lowerCompatibility
- Mil-spec AR-15, M4, and M16 lower receiver contours
- magazineCompatibility
- Post-2004 Glock OEM 9mm magazines with square magazine-catch notches; G26 and G27 magazines are too short
- Material
- 6061-T6 aluminum
- feedRamp
- Steel with nickel-boron finish
- boltRequirement
- 9mm bolt with Glock magazine cut
- bufferRequirement
- 5.4 oz or heavier buffer with carbine spring for 9mm
- operatingSystem
- Simple blowback; not compatible with CMMG Radial Delayed Blowback
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Add the Stern Defense MAG-AD9 Glock Magazine Adapter to your build and see how it enhances your platform.