Magpul PMAG 5/40 GEN M3 5.56×45




Magpul PMAG 5/40 GEN M3 5.56×45

The next-generation Magpul PMAG 5/40 GEN M3 5.56×45 is a 40-round 5.56×45 NATO (.223 Remington) polymer magazine for AR15/M4 compatible weapons. Along with an expanded feature set and greater compatibility, it incorporates new material technology and manufacturing processes for enhanced strength, durability, and reliability that exceed rigorous military performance specifications.

While the GEN M3 is optimized for Colt-spec AR15/M4 platforms, modified internal and external geometry also permits operation with a range of additional weapons such as the HK® 416/MR556A1/M27 IAR, British SA-80, FN® SCAR~ MK 16/16S, and others.

The Magpul PMAG 5/40 GEN M3 5.56×45 features a long-life stainless steel spring, a four-way anti-tilt follower and constant-curve internal geometry for reliable feeding, and simple tool-less disassembly for easy cleaning.

In addition, a redesigned bolt catch notch in the rear of the magazine provides increased bolt catch clearance, while an over-travel stop on the spine helps ensure the magazine will not over-insert on compatible weapons. Low profile ribs and new aggressive front and rear texture gives positive control of the GEN M3 in all environments, and a paint pen dot matrix has been added to the bottom panel of the body to allow easy marking by the end user for identification.

The new, easy to disassemble flared floorplate aids extraction and handling of the magazine while providing improved drop protection, but is slightly slimmer than before for better compatibility with tight double and triple magazine pouches.

Made in the USA.


  • Pinned to 5 round capacity
  • Impact and crush resistant polymer construction
  • Constant-curve internal geometry for smooth feeding
  • Anti-tilt, self-lubricating follower for increased reliability
  • USGI-spec stainless steel spring for corrosion resistance and field compatibility
  • Textured gripping surface and flared floor plate for positive magazine handling and easy disassembly
  • Made in U.S.A.
  • Weight: 135g

View more Magpul Magazines available at Victory Ridge Sports here.


Magpul PMAG 5/40 GEN M3 5.56×45

Caliber: 5.56x45mm NATO / .223 Rem
Platform: STANAG 4179 pattern
Capacity: 5 rounds pinned (original capacity 40 rounds)
Weight: 6.6oz.
Length Max: 9.75″
Compatibility: Not compatible with S80, HK416, or similar platforms




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