Mean Arms Exomag 9mm Luger 15 Round With Ejector Black

The Mean Arms Exomag 9mm Luger 15-round magazine with ejector is built for shooters who want to run 9mm through their AR-15 platform without swapping lower receivers or fumbling with adapters. This black polymer magazine uses a standard STANAG profile—same shape, same feel, same gear compatibility as your existing 5.56 mags—so you keep your muscle memory intact when switching between calibers. Drop in a 9mm upper (Glock or Colt variant BCG), lock in this mag, and you're running 9mm with zero modifications to your lower.

The ejector version works with standard blowback 9mm bolts, making it compatible with most common 9mm upper builds. You'll get the last-round bolt-hold-open feature that any AR should have, and the mag feeds reliably through everything from standard FMJ to hollow points—no picky ammo bias here. Because it's a true drop-in magazine, not a magwell adapter kludge, you get a reliable, straightforward platform swap without the learning curve or extra hardware.

Built from specialty-formulated polymer, the Exomag arrives fully assembled and ready to load. Your existing mag pouches, storage racks, and STANAG accessories all work with it. If you're a multi-caliber AR builder or someone who wants the flexibility to run 9mm without a dedicated lower, this magazine eliminates the excuses and keeps things simple.

Key Features

• Standard STANAG magazine profile—uses your existing 5.56 mag pouches and accessories
• 15-round capacity in 9mm Luger
• Ejector version for standard blowback 9mm bolts (Glock and Colt variants)
• Last-round bolt-hold-open feature
• Feeds all 9mm ammunition types, including hollow points
• Fully assembled; no tools or modifications required
• No magwell adapter needed—true drop-in magazine
• Specialty-formulated polymer construction

Specifications

Frequently Asked Questions

Does the Exomag work with my AR-15 lower receiver?

Yes. The Exomag is a true drop-in magazine that uses your standard 5.56 lower receiver without any modifications, drilling, or special adapters. You only need to swap your 9mm upper onto your existing lower.

Which 9mm uppers and bolt carriers does this magazine support?

The ejector version works with standard blowback 9mm bolts, including Glock and Colt variant BCGs. If you have a Bearing Delay or CMMG Radial Delay system, you'll need the ejectorless version instead.

Can I use my existing 5.56 magazine pouches and accessories with the Exomag?

Yes. The Exomag uses a standard STANAG magazine profile, so it's compatible with mag pouches, storage racks, caliber indicators, and other STANAG accessories you already own.

What ammunition does the Exomag feed reliably?

The magazine feeds all 9mm Luger ammunition, including standard FMJ, hollow points, and other 9mm loads—no ammo restrictions.