Mean Arms Exomag 9mm Luger 20 Round Ejectorless Black

The Mean Arms Exomag 9mm Luger 20 round ejectorless magazine lets you transform your standard AR-15 lower into a reliable 9mm shooter without any permanent modifications. Designed specifically for delayed-blowback 9mm uppers like the Mean Arms Bearing Delay and CMMG Radial Delay systems, this ejectorless version maintains the familiar STANAG profile so you can keep the same lower receiver, the same mag pouches, and the same muscle memory you've built with your 5.56 rifle. Just swap in a 9mm upper and you're ready to run 9mm — no adapter, no tools, no gunsmithing.

What makes the Exomag stand out is its straightforward engineering. It feeds everything from standard full metal jacket rounds to hollow points without fussiness, and the last round bolt-hold-open feature works just as you'd expect on an AR platform. Because it uses the standard STANAG magazine footprint, you can deploy all your existing mag accessories — pouches, storage racks, caliber indicators — without hunting for dedicated 9mm gear. Whether you're training, competing, or running drills, you don't have to relearn your reload stroke or adjust your carry setup.

The magazine ships fully assembled in black polymer, ready to load and run. It's built for shooters who want flexibility and reliability in a 9mm conversion system without compromise. Note that magazine capacity laws vary by state; verify your local regulations before ordering.

Key Features

• Ejectorless design optimized for Mean Arms Bearing Delay and CMMG Radial Delay 9mm upper receivers
• Standard STANAG magazine profile — no modifications to your 5.56 lower receiver required
• Last round bolt-hold-open feature for proper AR platform function
• Compatible with all standard AR magazine pouches and accessories
• Feeds all 9mm ammunition types, including hollow points
• 20-round capacity
• Fully assembled and ready to use
• Durable polymer construction

Specifications

Frequently Asked Questions

Which 9mm AR upper systems is this magazine designed for?

The Exomag ejectorless version is specifically engineered for delayed-blowback bolt carriers, including Mean Arms Bearing Delay uppers and CMMG Radial Delay systems. If you own either of these systems, select the ejectorless option.

Can I use this magazine with my standard AR-15 lower receiver?

Yes. The Exomag maintains the STANAG magazine profile, so no modifications to your existing 5.56 lower receiver are needed. Simply install a compatible 9mm upper and you're ready to fire.

Will this magazine work with all types of 9mm ammunition?

The Exomag feeds all standard 9mm ammunition, including full metal jacket, hollow point, and other factory loads. It's not ammunition-picky.

What comes in the box?

The magazine arrives fully assembled in black polymer with no additional tools or components required. It's ready to load and use immediately.