The PMAG 40 AR/M4 GEN M3, 5.56x45. The PMAG 40 GEN M3 (NON WINDOW) is a polymer magazine for AR15/M4 compatible firearms with an expanded feature set and compatibility compared to our earlier PMAGs. Advances in material technology and manufacturing processes help to make this the most reliable and durable PMAG to date. Polymer technology is constantly advancing, and MAGPUL is continually pushing the boundaries of what is possible with new materials, manufacturing methods, and quality control. What MAGPUL arrived at with the GEN M3 is a magazine that is significantly stronger in all areas. Performance in feed lip impact, spine strength, side impact, cold and hot weather impacts, and crush testing have all improved significantly over previous generations—to the point that we think you’ll find the results impressive, to say the least. Made in the USA.

Specifications: Caliber: 223 Remington / 5.56x45mm NATO, Capacity: 40 Rounds, Body Material: Polymer NON WINDOWED, Color: Black, Follower: Anti-Tilt, Spring: Stainless Steel, Floorplate: Polymer, Removable. Notice As of November 1st 2023 Impact / Dust Covers are sold separately.

This is for one 40 round magazine.

Magpul AR15 M4 Magazine M3 Black 40 rnd. NO WINDOW


  • Shipping Weight: 0.7lbs
  • Manufactured by: Magpul
34 Units in Stock
West Warehouse: 6
East Warehouse: 28
  • Available for delivery to your specified location
  • Available for IMMEDIATE PICKUP in Pahrump at ASW West