As a fan of 300 Blackout, very specifically the 110-grain Barnes Blacktip, I’ve been waiting on just this product for a while now, appreciating the smaller footprint of an SBR fitted with a 20-round mag. (Admittedly, the lower round count also discourages me from wasting rounds that are currently difficult to obtain.) I’m looking forward to grabbing a dozen or so, as I have been very happy with Magpul’s 30-round 300 Blackout specific offering.
Via the Magpul website:
PMAG® 20 AR 300 B GEN M3®
Compact 300 BLK® PMAG
The PMAG 20 for 300 BLK has the same features as our PMAG 30 AR 300 B, but its compact 20-round body allows for increased maneuverability and creates a more concealable package when used in small format firearms. Due to the wide variety of projectile weights and profiles, a dedicated 300 BLK magazine offers greater reliability and a safer way to feed your 300 BLK rifle. The PMAG 20’s distinct ribbed design and smoother upper-half texture also provide 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 20 also incorporates all of our advanced GEN M3 features.
- Design optimized for maximum reliability using 300 Blackout ammunition
- Utilizes all PMAG Gen M3 556/300B compatible accessories
- Unique rib design to provide instant differentiation from 556 mags in all condition
The PMAG 20 AR 300 B GEN M3 is a purpose-built magazine for rifles chambered in .300 Blackout® (300 BLK). Similar in every way to our PMAG 30 AR 300 B, the PMAG 20 is more compact for increased maneuverability and creates a more concealable package for use in small format firearms.
Since its inception, 300 BLK shooters have had to use a magazine designed for another cartridge, limiting that round’s ultimate performance and compatibility. One of the key features of 300 BLK in the past has been its compatibility with 5.56x45mm magazines. However, even with moderate success with that particular magazine, it is a compromise to do so, with reliability and safety both being at risk.
In addition to the performance gained by a dedicated mag, the PMAG 20 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 20 AR 300 B’s distinct ribbed 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 BLK performance, the PMAG 20 incorporates all of our GEN M3 features, including 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.
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