magpul 300 blackout pmag
(Photo by Magpul)

Magpul may be looking to the past with its 10th anniversary celebration of the PMAG, but that doesn’t mean they’re living in it. At SHOW Show in Las Vegas, the Texas and Wyoming-based accessories manufacturer displayed lots of new goodies they’re rolling out this year, including the PMAG 30 AR 300 B GEN M3, a magazine specifically designed for rifles chambered in 300 Blackout. Here’s what Magpul says about their new 300 Blackout PMAG.

Since it’s inception, 300 Blackout shooters have had to use a magazine designed for another cartridge, limiting it’s performance and compatibility. One of the nice features of 300 Blackout 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 shapes potentially decreasing overall reliability, a dedicated 300 Blackout 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 5.56 mags, the potential to chamber and fire a 300 BLK round in a 5.56 rifle with catastrophic results requires diligent ammunition management by the shooter. The PMAG 30 AR 300 B’s distinct rib design provides the shooter a distinct visual and tactile difference from any other PMAG to mitigate dangerous cross-loading issues. Along with optimized 300 BLK performance, the PMAG 30 AR 300 B brings along 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, a paint pen dot matrix for marking and identification, and a dust/impact cover.

For an up close and personal look at Magpul’s 300 Blackout PMAG, check out the video below. For more on Magpul, visit

Up Next

SHOT Show 2017: Celebrating 10 Years of the Magpul PMAG

At SHOT Show 2017 in Las Vegas, Magpul looked to the past as the...