Magpul200189097
Magpul Mag800-Mct Pmag 30 Ar 300 B Gen M3 300$14.56
Availability: In Stock
The Magpul PMAG 30 AR 300 B Gen M3 is a purpose-built magazine designed specifically for rifles chambered in 300 Blackout—the cartridge that demands its own feeding solution. For years, 300 BLK shooters compromised with magazines engineered for other calibers, accepting reliability trade-offs and safety risks along the way. This dedicated 300 Blackout magazine eliminates that compromise, optimizing feed geometry for the unique dimensions of subsonic and supersonic 300 BLK ammunition across the full range of bullet weights and profiles you're likely to run.
What sets this magazine apart at a glance is its distinctive rib design and smooth upper-half texture—visual and tactile markers that instantly differentiate it from standard 5.56x45mm PMAGs. That differentiation matters: it's a practical safeguard against cross-loading rounds into the wrong rifle, a critical consideration when mixing calibers on the range or in the field. Build quality reflects Magpul's Gen M3 standard: next-generation impact and crush-resistant polymer, aggressive grip texture front and rear, and a removable slim floor plate for easy cleaning and maintenance. A paint pen dot matrix is molded in, so you can mark and identify your mags at a glance. Made in the USA.
The PMAG 30 AR 300 B runs 30 rounds and maintains broad compatibility with STANAG 4179 platforms—AR15, M4, M16, and even cross-platform systems like the FN SCAR and IWI Tavor. Whether you're running an 8-inch pistol, 10.5-inch subgun, or 16-inch hunting rifle in 300 Blackout, this magazine delivers the reliability the caliber deserves.
| Caliber | .300 AAC Blackout |
| Platform | AR15, M4, M16, and other STANAG 4179 platforms |
| Capacity | 30 rounds |
| Weight | 5 oz |
| Maximum Length | 7.5 in |
| Color | Olive Drab Green |
Yes. The PMAG 30 AR 300 B is designed for rifles chambered in .300 AAC Blackout and maintains compatibility with AR15 platforms as well as other STANAG 4179-compliant systems including M4, M16, FN SCAR, and IWI Tavor.
No. This magazine is purpose-built for 300 Blackout geometry and is not recommended for use in 5.56x45mm rifles. The dedicated design eliminates the cross-loading risk that comes with using 5.56 magazines in 300 BLK rifles, and this magazine's distinct rib and texture are intentionally different from standard PMAG designs to prevent dangerous mix-ups.
The Gen M3 features Magpul's next-generation impact and crush-resistant polymer, aggressive front and rear texture for improved grip, an easily removable slim floor plate, and a paint pen dot matrix for marking. These refinements improve durability and usability across the board.
No. The PMAG 30 AR 300 B Gen M3 does not include a dust cover; it is sold as a magazine only.
SKU: 200189080
Availability: In Stock
The Magpul PMAG 30 AR 300 B Gen M3 is a purpose-built magazine designed specifically for rifles chambered in 300 Blackout—the cartridge that demands its own feeding solution. For years, 300 BLK shooters compromised with magazines engineered for other calibers, accepting reliability trade-offs and safety risks along the way. This dedicated 300 Blackout magazine eliminates that compromise, optimizing feed geometry for the unique dimensions of subsonic and supersonic 300 BLK ammunition across the full range of bullet weights and profiles you're likely to run.
What sets this magazine apart at a glance is its distinctive rib design and smooth upper-half texture—visual and tactile markers that instantly differentiate it from standard 5.56x45mm PMAGs. That differentiation matters: it's a practical safeguard against cross-loading rounds into the wrong rifle, a critical consideration when mixing calibers on the range or in the field. Build quality reflects Magpul's Gen M3 standard: next-generation impact and crush-resistant polymer, aggressive grip texture front and rear, and a removable slim floor plate for easy cleaning and maintenance. A paint pen dot matrix is molded in, so you can mark and identify your mags at a glance. Made in the USA.
The PMAG 30 AR 300 B runs 30 rounds and maintains broad compatibility with STANAG 4179 platforms—AR15, M4, M16, and even cross-platform systems like the FN SCAR and IWI Tavor. Whether you're running an 8-inch pistol, 10.5-inch subgun, or 16-inch hunting rifle in 300 Blackout, this magazine delivers the reliability the caliber deserves.
| Caliber | .300 AAC Blackout |
| Platform | AR15, M4, M16, and other STANAG 4179 platforms |
| Capacity | 30 rounds |
| Weight | 5 oz |
| Maximum Length | 7.5 in |
| Color | Olive Drab Green |
Yes. The PMAG 30 AR 300 B is designed for rifles chambered in .300 AAC Blackout and maintains compatibility with AR15 platforms as well as other STANAG 4179-compliant systems including M4, M16, FN SCAR, and IWI Tavor.
No. This magazine is purpose-built for 300 Blackout geometry and is not recommended for use in 5.56x45mm rifles. The dedicated design eliminates the cross-loading risk that comes with using 5.56 magazines in 300 BLK rifles, and this magazine's distinct rib and texture are intentionally different from standard PMAG designs to prevent dangerous mix-ups.
The Gen M3 features Magpul's next-generation impact and crush-resistant polymer, aggressive front and rear texture for improved grip, an easily removable slim floor plate, and a paint pen dot matrix for marking. These refinements improve durability and usability across the board.
No. The PMAG 30 AR 300 B Gen M3 does not include a dust cover; it is sold as a magazine only.
SKU: 200189080