Magpul® PMAG® 40 AR/M4 GEN M3™

(12 reviews)
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Magpul PMAG® 40 Rd AR/M4 GEN M3

The next-generation PMAG® 40 GEN M3 is a 40-round 5.56x45 NATO (.223 Remington) polymer magazine for AR15/M4 compatible weapons. Along with expanded feature set and compatibility, the GEN M3 incorporates new material technology and manufacturing processes for enhanced strength, durability, and reliability to exceed rigorous military performance specifications.

Modified internal and external geometry also permits operation with a wide range of non Colt-spec platforms such as the HK® 416 and MR556A1, M27 IAR, British SA-80, FN® SCAR™ MK 16/16S, and others. 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.

Similar to the MOE PMAG®, the GEN M3 features a long-life stainless steel spring, four-way anti-tilt follower and constant-curve internal geometry for reliable feeding, and simple tool-less disassembly to ease cleaning. 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.


  • Next-generation impact and crush resistant polymer construction
  • Modified dimensions allow for wider compatibility with non Colt-spec platforms
  • Constant-curve internal geometry for smooth feeding
  • Anti-tilt, self-lubricating follower for increased reliability
  • Long life stainless steel spring
  • Over-travel insertion stop on the spine
  • Ribbed gripping surface and new aggressive front and rear texture for positive magazine handling
  • Paint pen dot matrix panels on the bottom of the body to allow for identification marking
  • Flared floorplate aids magazine handling and disassembly yet is slim enough for use with many double and triple pouches

Made in the U.S.A.


  • 5
    New customer.

    Posted by Lonnie & Swedeen on 11th Mar 2018


  • 5
    40 Rounds

    Posted by Tim T on 24th Oct 2016

    What else needs to be said?

  • 5

    Posted by Shaun on 31st Aug 2016

    How can you ship these soo fast? I ordered these on thursday evening and had them in my hand monday afternoon. These work flawlessly and look great on my AR. Thank you!!!

  • 5

    Posted by Unknown on 17th Jan 2016

    100% reliable! 160 rounds and not one feed failure. 5.56, .233 & 300 ACC!

  • 5
    Awesome capacity

    Posted by Semper Fuzz on 7th Dec 2015

    Can't beat 40 rounds. Would be nice if these ones had Windows on them. Great for carrying on my Tac Vest X 2 open top holder. Looks bad ass,

  • 5
    40rd Pmag Gen3

    Posted by 11b on 26th Oct 2015

    No issues, wish I had a few years back while I was still in.

  • 5
    Duh, Two Thumbs Up!

    Posted by Badui Musa on 8th Oct 2015

    There's not much to say here... It's a Magpul product. Clearly, no company in the industry does more research and development than the guys at Magpul. If a little is good more MUST be better! For those of us in free states, replace those old standard capacity (30) magazines with the new(ish) Magpul 40 round clipazine!

  • 5
    Crew Served PMAGS!

    Posted by WKL on 7th Jun 2015

    Recently took advantage of the SKDTac Memorial Day sale to snap up some PMAG40's. Great service and fast shipping as always. Never been disappointed by these guys.

  • 5
    Works fine in POF

    Posted by Dale on 18th Jan 2015

    These work fine even in the older POF rifles. You must file the little over stop tab down just a little which take all of about 2 mins of time on each mag. I do love these 3rd generation Pmags as they are more grippy and seem to be a little more sturdy. The over stop makes for a nice distinct stop so don't worry about shoving the mag in as hard as you'd like.