Magpul PMAG 30 AR 300 BLK GEN M3 Magazine

The Magpul PMAG 30 AR 300 BLK GEN M3 available at Armax United is purpose-built for rifles chambered in .300 Blackout (300 BLK), delivering reliable feeding across the wide variety of bullet weights and projectile profiles commonly used with this versatile cartridge. Engineered specifically for 300 BLK, this magazine combines Magpul's proven GEN M3 construction with an optimized internal geometry to provide dependable performance for hunting, home defense, tactical applications, and range use.

Unlike standard 5.56 NATO magazines, the PMAG 30 AR 300 BLK GEN M3 features a patented internal geometry specifically designed to accommodate the unique dimensions and bullet shapes of .300 Blackout ammunition. This specialized design helps ensure consistent feeding with both supersonic and subsonic loads, improving reliability across a broad range of ammunition types.

To help prevent cross-loading, the magazine incorporates unique visual and tactile identifiers, including a distinctive rib pattern and textured upper body that allow shooters to quickly distinguish it from standard 5.56 PMAGs—even in low-light conditions or while wearing gloves.

Constructed from Magpul's advanced crush-resistant polymer, the PMAG GEN M3 is built to withstand heavy use, impacts, and harsh environmental conditions without sacrificing performance. A removable floorplate allows for quick cleaning and maintenance, while the integrated paint pen dot matrix provides a convenient way to label and identify magazines.

Compatible with all PMAG accessories and Magpul Tactile Lock Plates, the PMAG 30 AR 300 BLK GEN M3 offers additional customization options while maintaining the durability and reliability shooters expect from Magpul.

Proudly made in the USA, this magazine is the ideal choice for anyone running a dedicated .300 Blackout rifle or pistol.

Features

• Specifically engineered for .300 Blackout (300 BLK) ammunition
• 30-round capacity
• Patented internal geometry optimized for a wide range of bullet weights and profiles
• Reliable feeding with both supersonic and subsonic loads
• Distinctive visual and tactile features help prevent confusion with 5.56 magazines
• Advanced GEN M3 crush-resistant polymer construction
• Compatible with all PMAG accessories and Magpul Tactile Lock Plates
• Paint pen dot matrix for easy magazine identification
• Removable floorplate for simple cleaning and maintenance
• Built for dependable performance in demanding environments
• Made in the USA

Whether you're building a suppressed .300 Blackout rifle, setting up a hunting platform, or upgrading your defensive firearm, the Magpul PMAG 30 AR 300 BLK GEN M3 delivers the reliability, durability, and caliber-specific performance needed for every shot.