Mean Arms Exomag 9mm Luger 40 Round Ejectorless Black

The Mean Arms Exomag 9mm Luger 40 round ejectorless magazine is purpose-built for AR platform shooters running 9mm uppers with specialized bolt carrier groups. If you own a Bearing Delay or CMMG Radial Delay 9mm upper, this ejectorless version is the magazine you need—it's engineered specifically to work with those delay systems without the round ejection dynamics of standard blowback bolts. Unlike conversion kits that require magwell adapters or modification to your lower receiver, the Exomag drops into any standard AR-15 lower exactly like a 5.56 magazine, keeping your rifle's compatibility intact while letting you swap calibers by simply changing uppers.

What makes the Exomag stand out is its straightforward design: it's a real magazine, not an adapter, and it feeds reliably with all common 9mm ammunition types, including hollow points. The 40-round capacity gives you substantial trigger time between reloads at the range or in training scenarios. Since the Exomag maintains the same STANAG footprint and feel as your existing 5.56 magazines, your reload drills, muscle memory, and magazine handling stay consistent—no learning curve, no new technique to master. You'll even use your existing mag pouches, storage solutions, and other STANAG accessories without modification.

Built from specially formulated polymer and fully assembled out of the box, the Exomag ships ready to load and run. It features last-round bolt-hold-open functionality, just like a standard AR should, so you get proper slide-lock behavior when you run dry. Whether you're building a dedicated 9mm trainer upper or adding a second caliber option to your existing lower, this magazine makes the multi-caliber AR concept genuinely practical—no gunsmithing, no adapter hassle, just load and shoot.

Key Features

• 40-round 9mm capacity in standard STANAG-profile magazine body
• Ejectorless design optimized for Bearing Delay and CMMG Radial Delay upper receivers
• Fully compatible with standard AR-15 lowers—no modifications required
• Feeds all 9mm ammunition types, including hollow points
• Last-round bolt-hold-open feature for proper AR function
• Drop-in ready; fully assembled with no tools needed
• Compatible with existing STANAG magazine accessories (pouches, racks, indicators)
• Durable, specially formulated polymer construction

Specifications

Frequently Asked Questions

Will this magazine work with my Bearing Delay or CMMG Radial Delay 9mm upper?

Yes. The Exomag ejectorless version is specifically designed for Bearing Delay and CMMG Radial Delay systems. These specialized bolt carrier groups require an ejectorless magazine to function correctly, which is exactly what you're getting here.

Do I need to modify my AR lower receiver to use the Exomag?

No. The Exomag maintains the standard STANAG magazine profile and drops directly into any AR-15 lower receiver without any modifications, drilling, or special adapters. Your lower stays completely unchanged.

Can I use my existing STANAG magazine pouches and accessories with this magazine?

Yes. Because the Exomag is built to the standard STANAG footprint and form factor, it works with existing magazine pouches, storage racks, and other accessories designed for AR magazines. You'll maintain the same handling feel and gear compatibility as your 5.56 magazines.

What types of 9mm ammunition will this magazine feed?

The Exomag is not ammunition-specific and feeds all common 9mm Luger loads, including standard full metal jacket, hollow point, and other commercial 9mm ammunition.