The Magpul PMAG 40 GEN M3 is a 40-round polymer magazine designed for AR-15/M4-compatible rifles and chambered for .223 Remington/5.56×45 NATO. Made in the USA, the GEN M3 incorporates updated materials and manufacturing processes to improve strength, durability, and feeding reliability. It features a long-life stainless steel spring, a four-way anti-tilt follower, and constant-curve internal geometry to support consistent operation. Ergonomic exterior texturing, a flared floorplate, and a paint pen dot matrix for user identification round out the practical feature set.
Key Specifications
- Holds 40 rounds.
- Compatible with .223 Rem/5.56 NATO cartridges.
- Constructed from polymer for durability and weight savings.
- Finished in black.
- Model: PMAG 40 GEN M3.
- Fits AR-15/M4-compatible rifles.
- Features a long-life stainless steel spring and a four-way anti-tilt follower for reliable feeding.
- Allows tool-less disassembly for cleaning and maintenance.
- Includes a redesigned bolt catch notch and an over-travel stop to aid compatibility and insertion control.
- Compatible with select platforms including HK416/MR556A1/M27, British SA-80, FN SCAR MK16/16S.
Built for consistent field use, the PMAG 40 GEN M3 combines proven feeding geometry with user-focused details like improved texture, a slimmer flared floorplate for pouch compatibility, and easy maintenance. It’s a practical option for range work, training, duty, and organized sport where dependable magazines and straightforward upkeep are valued.
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