Mean Arms Ar-9 Endomag 9mm 10-Round Black

The Mean Arms AR-9 Endomag 10-round 9mm magazine is built for shooters in capacity-restricted states who want to run a 9mm upper on a standard AR-15 lower receiver. This isn't a workaround that compromises function—it's a purpose-built magazine engineered to deliver reliable feeding with a fixed baseplate that meets legal compliance requirements. If you're into PCC (pistol-caliber carbine) shooting, competition clubs, or just want the versatility of 9mm in an AR platform without sacrifice, the Endomag gives you real performance in a legal package.

Built on the proven foundation of Magpul PMAG construction, the Endomag drops into any standard AR-15 magazine well, so you won't need to modify your lower or swap components. The fixed baseplate design makes it a fixed, unmodifiable magazine—important for folks in states with strict magazine restrictions. It's engineered to work with both Glock- and Colt-pattern bolt-carrier groups, covering the most common 9mm AR setups. Feed it standard 9mm ammunition and it'll run reliably; it also plays nice with all standard Magpul PMAG-compatible accessories.

Whether you're stocking a new build, running a PCC at your local match, or just want the flexibility to swap uppers on a single lower, the Endomag removes the guesswork. No jury-rigged fixes, no proprietary lowers required—just honest engineering that respects your legal limits and delivers on function.

Key Features

• 10-round capacity, legal and compliant for restricted states
• Fixed baseplate design ensures unmodifiable construction
• Fits all standard AR-15 magazine wells without modification
• Compatible with Glock- and Colt-pattern 9mm bolt-carrier groups
• Functions with all standard 9mm ammunition
• Magpul PMAG-based construction and compatibility
• Works with standard Magpul PMAG-compatible accessories

Specifications

Frequently Asked Questions

Will the Mean Arms AR-9 Endomag fit my AR-15 lower without modification?

Yes. The Endomag is designed to drop into any standard AR-15 magazine well without requiring any changes to your lower receiver.

What 9mm bolt-carrier groups does this magazine work with?

The Endomag is compatible with both Glock-pattern and Colt-pattern bolt-carrier groups, which covers the most common 9mm AR platform setups.

Is the Mean Arms AR-9 Endomag legal in restricted-capacity states?

Yes. The fixed baseplate design makes it an unmodifiable, fixed magazine that meets compliance requirements for states with 10-round limits.

What ammunition does this magazine feed?

The Endomag functions with all standard 9mm ammunition.