Magpul® PMAG 40 GEN M3 5.56x45 NATO 40-Round Magazine
Elevate your AR15/M4 with the Magpul® PMAG 40 GEN M3, a 40-round 5.56x45 NATO (.223 Remington) polymer magazine engineered for unmatched strength, durability, and reliability. Optimized for Colt-spec platforms, its advanced geometry ensures compatibility with HK® 416, British SA-80, FN® SCAR MK 16/16S, and more. Featuring a stainless steel spring, four-way anti-tilt follower, and constant-curve design, it guarantees smooth feeding. With a redesigned bolt catch notch, over-travel stop, aggressive texturing, and a paint pen dot matrix, this USA-made magazine offers superior control, easy marking, and tool-less disassembly.
 
40-round capacity for extended shooting
Advanced polymer construction exceeds military specs
Stainless steel spring and anti-tilt follower for reliable feeding
Flared floorplate enhances handling and drop protection
Made in the USA for trusted quality
 
Shop the Magpul PMAG 40 GEN M3 for top-tier performance and compatibility!