Mean Arms ExoMag

The MEAN ExoMag is designed to be the most reliable and best feeding 9mm magazine for use with a standard AR lower. The ExoMag has a STANAG magazine outer shape. Add the 9mm upper of your choosing to function with a Glock or Colt variant 9mm BCG. We offer both a version with an EJECTOR (for standard blowback bolts) and an EJECTORLESS version (for our Bearing Delay and CMMG Radial Delay systems). All ExoMag models include the last round bolt-hold open feature, as any AR-15 should.

Bearing Delay Upper owners: Customers with the Bearing Delay System should select the "Ejectorless" option.

CMMG Radial Delay owners: If you have a CMMG Radial Delay firearm, select the "Ejectorless" option.

ExoMag features:

• Facilitates quick and easy caliber change from .223/5.56 to 9mm
• Functions as a magazine!
• No magwell adapter needed!
• Keep your standard 5.56 Multi Caliber lower receiver!
• Comes fully assembled.
• No tools required.

Key Functions

• No modifications to your 5.56x45 lower receiver! Changing calibers is now simply a complete 9mm upper for your AR platform. No nuts, no bolts, no drilling, no bull.
• Last round bolt-hold open feature, just as an AR-15 should function.
• Built-in ejector designed to perform under intense conditions.
• Magazine is 7.90" tall.