The PMAG 40 AR/M4 GEN M3 gives you 10 extra rounds more than the standard 30 without adding bulk or compromising performance. Built with the same crush-resistant polymer, constant-curve geometry, and anti-tilt follower as the rest of the GEN M3 family, the PMAG 40 delivers dependable feeding and rugged durability in any environment. When capacity matters and reliability can’t be questioned, the PMAG 40 delivers. Made in the USA.