The polymer magazine that revolutionized magazine technology for the AR-15/M16/M4 platform just got even better. The third-generation PMAG further expands the strength, reliability, and versatility of the original PMAG. Along with all variants of the AR-15/M16/M4, the GEN M3 is fully compatible with the HK® 416 and MR556A1, M27 IAR, British SA-80, and even the FN® SCAR™ MK 16/16S. It’s molded from a polymer formula that delivers distinctly greater resistance to crushing and all forms of impact, with extra reinforcement in the mag catch and feed lip areas. A new-design four-way anti-tilt follower ensures even smoother feeding, even when contaminated by dust or grit. Pop Mfg: Magpul SPECS: Impact/crush-resistant molded hard polymer, Black or Sand. Compatible with AR-15/M4/M16, HK® 416, MR556A1, M27 IAR, British SA-80, FN® SCAR™ MK 16/16S, and other similar lowers. 5.56mm/.223 ammunition only.