The next-generation PMAG 40 GEN M3 is a 40-round 5.56×45 NATO (.223 Remington) polymer magazine for AR15/M4 compatible weapons. Along with expanded feature set and compatibility the GEN M3 incorporates new material technology and manufacturing processes for enhanced strength durability and reliability to exceed rigorous military performance specifications. While the GEN M3 is optimized for Colt-spec AR15/M4 platforms modified internal and external geometry also permits operation with a range of additional weapons such as the HK