Magpul PMAG 40 AR/M4 GEN M3 Magazine 40-Round 5.56x45mm NATO

The Magpul PMAG 40 AR/M4 GEN M3 is a 40-round 5.56x45 NATO polymer magazine for AR-15/M4 compatible weapons. It features a stainless steel spring, a four-way anti-tilt follower, and constant-curve internal geometry for reliable feeding. Tool-less disassembly for easy cleaning, a redesigned bolt catch notch for increased clearance, and an over-travel stop on the spine to prevent over-insertion. Low profile ribs and textured surfaces provide positive grip, and a paint-pen dot matrix on the bottom panel allows identification. The flared floorplate aids extraction and drop protection while remaining slim for compatibility with tight magazine pouches. Optimized for Colt-spec AR-15/M4 platforms, it also works with HK416 MR556A1 M27 IAR and other weapons.