Magpul | PMAG GEN M3 | 223 Rem | 5.56 NATO | Black

A 40‑round PMAG (MAG233) is Magpul taking the GEN M3 AR/M4 magazine and stretching it for extra capacity without going to a drum. Same impact- and crush‑resistant polymer, anti‑tilt follower, constant‑curve internals, and USGI‑spec stainless spring as the 30‑round GEN M3, in a body that holds 40 rounds of 5.56 NATO / .223 Remington. Magpul even has an NSN on the black magazine. The extra length will not fit every 30‑round pouch and it sits taller in the mag well than a standard PMAG, so treat it as a dedicated high‑capacity mag, not a drop‑in pouch match. Made in the USA.