Magpul PMAG 40 AR-15 Gen M3 5.56 40rd Magazine

The PMAG 40 AR/M4 Gen M3 stretches the Gen M3 polymer body to 40 rounds of 5.56 NATO or 223 Rem. Magpul optimized it for Colt spec AR-15/M4 rifles, and modified dimensions let it run in the HK 416, MR556A1, M27 IAR, FN SCAR 16/16S and SA80 as well.

Feeding comes from constant curve internal geometry and an anti-tilt follower on a long life stainless steel spring. The body has low profile ribs and aggressive texture for a sure grip, plus a redesigned bolt catch notch, an over travel stop, a paint pen dot matrix for marking, and a flared floorplate that comes apart without tools.