The Magpul 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 the 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.

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, there is potential to chamber and fire a 300 BLK round in a 5.56 rifle – with catastrophic results. 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 Magpul’s GEN M3 features, including 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.

The PMAG 20 AR 300 B GEN M3 offers a wide compatibility with most ‘STANAG 4179’ platforms such as the AR15/M4, FN SCAR, IWI Tavor, and others.