Magpul 300 BLK Magazine

(1 customer review)


  • Never accidently throw the wrong mag in your 300 BLK
  • Designed exclusively for the 300 Blackout cartridge
  • Will never wear off
  • Design laser engraved on both sides
  • New magazines, packages are only opened to laser design on
  • Magpul’s durable polymer magazines have became the standard for quality. 

Out of stock


The PMAG 30 AR 300 B GEN M3 is a purpose-designed magazine for rifles chambered in 300 Blackout® (300 BLK). Since its inception, 300 BLK shooters have had to use a magazine designed for another cartridge, limiting its ultimate performance and compatibility. One of the key features of 300 BLK is the compatibility with 5.56x45mm parts, but with the magazine, it is a compromise to do so. Due to the wide variety of projectile weights and profiles potentially decreasing overall reliability, a dedicated 300 BLK magazine was a logical step for the PMAG line.

In addition to the performance gained by a dedicated mag, the PMAG 30 AR 300 B also offers a safer way to feed your 300 BLK rifle. When using 5.56x45mm mags, the potential to chamber and fire a 300 BLK round in a 5.56x45mm rifle with catastrophic results requires diligent ammunition management by the shooter. The PMAG 30 AR 300 B’s distinct rib design and smoother upper-half texture provides the shooter a distinct visual and tactile difference from any other PMAG to mitigate dangerous cross-loading issues.

Along with optimized 300 Blackout performance, the PMAG 30 AR 300 B incorporates all of the GEN M3 features such as our next-generation impact and crush resistant polymer, aggressive front and rear texture, an easily removable slim floor plate, and a paint pen dot matrix for marking and identification.

Made in the USA.

***Cannot be sold to California, Colorado, Connecticut, Hawaii, Maryland, Massachusetts, District of Columbia, New Jersey, and New York residents due to large capacity magazine restrictions.

1 review for Magpul 300 BLK Magazine

  1. milesjmurphy (verified owner)

    Schiwerks has been my go to for quality laser engraved magazines in the past. Like the classic ‘Merica mag, this one is no exception. With the permanent laser markings, it prevents the need for paint, tape, bands, or other methods of separating your 300 blk mags from your standard 223/5.56 mags. Promptly shipped and well packed. You can never go wrong with Schiwerks.

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