There’s no denying the growth in the popularity and capability of 300 BLK in the last ten years. Magpul designed the PMAG 30 AR 300 B GEM M3 to optimize the reliability of feeding 300 BLK by addressing the unique feed stack geometries of the many different 300 BLK rounds out there. Magpul also added a unique rib design and upper-half body texture that provide distinct visual and tactile differences from their other PMAGs to help mitigate dangerous cross-loading mistakes. As a result, you’ll get more reliable feeding and decrease the odds of putting the wrong round in your gun.

Along with optimized performance and increased safety through differentiation, the PMAG 30 AR 300 B incorporates the Magpul GEN M3 features that make our magazines the gold standard, including construction using next-generation impact and crush-resistant polymer, aggressive front and rear texturing for better handling, an easily removable floor plate for cleaning and maintenance, and a paint pen dot matrix for marking and identification.