Magpul PMAG 20 AR/M4 GEN M3 5.56 NATO AR-15 Magazine - Black

Manufactured by Magpul Industries
Manufactured by Magpul Industries
175 Reviews

In Stock

NOTE: Limit 5 per household. Quantities exceeding 5 will not allow checkout.

Orders of non-FFL items will ship same-day if placed before 3:30pm CST. FFL orders will ship within 7 business days if transfer details are provided

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Magazines considered High Capacity are controlled by the ATF and/or local jurisdictions are not available for purchase/shipment in all areas.



The Magpul PMAG 20 AR/M4 GEN M3 5.56 NATO AR-15 Magazine in black is a high-quality, reliable magazine designed for use with AR-15 rifles. This magazine is made from durable polymer materials and features a unique design that ensures reliable feeding and easy handling. With a capacity of 20 rounds, this magazine is perfect for a variety of shooting applications, from target shooting to tactical operations.

The magazine features high-quality polymer construction with a four-way anti-tilt follower and constant curve geometry for reliable feeding. The Gen M3 magazine includes a redesigned bolt catch notch for improved bolt catch clearance and an over-travel stop spine that prevents it from being over-insert. Its slim shape, low profile ribs, and textured surface make it easy to store in tight magazine pouches and rapidly retrieve it when needed. The paint pen dot matrix located near the bottom of the panel provides a space for marking the magazine for easy identification.

NOTE: GEN M3 PMAGs may not be compatible with all billet lowers without slight modification of the magazine overtravel stop.


  • Holds 20 rounds of 5.56 ammunition
  • Impact-resistant polymer construction
  • USGI-SPEC stainless steel spring
  • Four-way anti-tilt follower
  • Constant curve geometry
  • Redesigned bolt catch notch
  • Over-travel stop spine
  • Slim shape with low-profile ribs
  • Paint pen dot matrix for easy identification
  • Pop-off impact/dust cover

The Magpul PMAG 20 AR/M4 GEN M3 5.56 NATO AR-15 Magazine in black is a top-quality magazine that's great to keep on hand, so you can spend more time shooting and less time reloading. Whether you're a target shooter or a tactical operator, this magazine is sure to meet your needs and exceed your expectations.

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Caliber Gauge5.56 NATO
Magazine Capacity20
ManufacturerMagpul Industries
PlatformAR-15 Magazines
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

175 reviews


Magpul mags 20 rnd


Have not had the chance to test these yet as my lower has not been released for ok by MD state. Have heard nothing but good about Magpul and look forward to positive results




My favorite mag


...bought this one as a gift for my neighbor. It's all good. :)

20 Round Magpul Gen M3 Magazine


20 Round mag will go good with my 300 BLK OUT due the cost of the AMMO !!

Great deal


20rd magazine was just what I was looking for. 30 mags are a little too big and some times get in the way. Magpul's mags are built to last and PA dose it rite.

Good Product


A newly found on-line outlet for all of my newly acquired AR 15 quality needs and upgrades.

First Order - No Problems!


After searching for weeks I finally found the Magpul Magazines I was looking for - in stock and at a great price. I placed the order online and in less than a week I had a box on my doorstep. My first stop for future purchases will be Primary Arms!

Great product _ great service


Always the best in products in rapid order!!

Good Mag


Another great Magpul Mag. Excellent, what else can you say???

High quality product and service!


As one would expect, these mags are great! Primary Arms is also great! They shipped out right away and took no time to get to my house. These PMags are high quality like all the others. I had issues with the M2 version not looking my bolt back and while I haven't put a ton of rounds through these they have locked back every time!