Overview Reviews Product Description Magpul Industries PMAG M3, 300BLK, 20 Rounds, Fits AR Rifles, Black MAG1182-BLK Product Videos Product Reviews Write a Review Write a Review × Magpul Industries MAGPUL PMAG 20 AR 300 B GEN M3 BLK Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *