Mean Arms Exomag 9mm Luger 32 Round With Ejector Black

The Mean Arms Exomag 9mm Luger 32-round magazine with ejector is purpose-built for shooters who want to run 9mm on a standard AR-15 lower without complicated adapters or modifications. If you're looking to add a 9mm upper to your existing AR platform—whether for cost-effective training, home defense, or expanding your rifle's versatility—this magazine drops right in with no magwell conversion needed. The ejector version pairs with standard blowback 9mm bolt carrier groups (Glock or Colt variants), making it compatible with most common 9mm AR builds you'll find at any gun counter.

What sets the Exomag apart is its STANAG profile. You're not learning a new magazine or investing in a whole new ecosystem of pouches and carriers—it uses the same shape, dimensions, and accessories as your existing 5.56 magazines. Your muscle memory stays intact, your mag pouches still work, and you can mark it with standard caliber indicators. The last-round bolt-hold-open feature functions exactly like a traditional AR-15, so operation feels completely familiar. It's a smart way to build a true multi-caliber rifle without reinventing the wheel.

The Exomag comes fully assembled and ready to load—no tools, no gunsmithing required. Mean Arms engineered the magazine to handle all common 9mm ammunition types, including hollow points, so you're not restricted to specific loads. The specially formulated polymer construction delivers reliable feeding and durability for range sessions, training, and duty use. Capacity is 32 rounds, giving you substantial ammunition on tap in a familiar format.

Keep in mind that magazine capacity laws vary by jurisdiction. Before purchasing, verify your local and state regulations regarding standard-capacity magazines. This is your responsibility as the owner.

Key Features

• 32-round capacity in 9mm Luger
• STANAG magazine profile—compatible with existing AR mag pouches and accessories
• Ejector design for standard blowback 9mm bolt carrier groups (Glock/Colt variants)
• Last-round bolt-hold-open functionality
• Feeds all 9mm ammunition types, including hollow points
• No magwell adapter or lower receiver modification required
• Fully assembled; no tools needed
• Specially formulated polymer construction

Specifications

Frequently Asked Questions

Will this work with my existing AR lower receiver?

Yes. The Exomag requires no modification to your standard 5.56 lower. It uses the same STANAG magazine well and feeds from the same platform. Simply swap in a compatible 9mm upper receiver, and you're ready to shoot.

What's the difference between the ejector and ejectorless versions?

This is the ejector version, designed for standard blowback 9mm bolt carrier groups (Glock or Colt variants). If you're running a Bearing Delay upper (Mean Arms) or a CMMG Radial Delay system, you'll need the ejectorless version instead. Choose carefully based on your bolt carrier group type.

Can I use my existing mag pouches and accessories?

Yes. Because the Exomag maintains the standard STANAG profile, it fits into existing AR mag pouches, storage racks, and other 5.56 magazine accessories. You can also use standard caliber indicators to mark it as 9mm.

What ammunition does it feed?

The Exomag reliably feeds all common 9mm Luger ammunition types, including hollow points. It's not picky about load selection, so you can practice with whatever is available or suitable for your use case.