MAG CMMG AR15 338ARC 10RD BLK

The CMMG AR-15 .338 ARC magazine is a 10-round polymer magazine purpose-built for modern intermediate cartridge platforms. If you're running a .338 ARC upper on an AR-15 lower, feeding reliable ammunition through a quality magazine isn't optional—it's foundational to accurate shooting and consistent performance. CMMG's design focuses on the details that matter on the line: dependable feeding, straightforward maintenance, and the kind of durability you expect from a USA-made component.

The anti-tilt follower keeps rounds staged consistently as they feed into the chamber, reducing the friction and binding that can dog lesser designs. The high-visibility yellow follower isn't just about aesthetics—it gives you a quick visual check on round count and helps you spot a magazine that needs attention. Polymer construction keeps weight down without sacrificing the structural integrity needed for repeated loading cycles, whether you're drilling at the range or preparing for field use.

.338 ARC is a specialized intermediate round gaining traction with hunters and precision shooters who want more velocity and energy than 5.56 NATO but don't need the logistics and recoil of larger magnums. A quality magazine purpose-built for the cartridge eliminates compatibility guesswork—this one is designed for that specific round, feeding reliably through AR platforms configured for it. At 10 rounds, you're not overstocked, but you're also not underprepared.

Key Features

• 10-round capacity optimized for .338 ARC cartridges
• High-visibility yellow anti-tilt follower for reliable feeding and quick visual reference
• Polymer construction for durability and lightweight handling
• USA-made quality and engineering
• AR-15 platform compatible

Specifications

Frequently Asked Questions

Is this magazine compatible with my AR-15 .338 ARC build?

Yes. This magazine is specifically designed for .338 ARC and AR-15 platform rifles configured in that caliber. It will not function properly with other cartridges.

What's included with the magazine?

You receive the 10-round magazine. The yellow anti-tilt follower is built in.

Why does the follower have a high-visibility color?

The high-visibility yellow follower serves two purposes: it helps you quickly see how many rounds remain in the magazine at a glance, and it assists in diagnosing any feeding issues during maintenance or inspection.

Is this magazine made in the USA?

Yes, CMMG manufactures this magazine in the USA.