AR-15 Magazine - PMAG Gen M3 40 Round - 5.56 NATO/.223 Remington

Magpul Industries

$25.99
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SKU:
MGMPI233BLK
UPC:
873750009698
Shipping:
Calculated at Checkout
Bulk Pricing:
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Capacity:
40 rounds of shut the Fuck up.

AR-15/M4 Magazine – PMAG 40 GEN M3 40 Round – 5.56 NATO/.223 Remington Black


PLEASE DOUBLE CHECK DETAILS AND FITMENT BEFORE PURCHASE.

The Magpul PMAG 40 AR/M4 GEN M3 is a 40-round polymer magazine built for AR-15/M4 compatible rifles chambered in 5.56 NATO or .223 Remington. It gives you 10 extra rounds over a standard 30-round magazine without jumping into drum-mag territory.

This is the middle ground for shooters who want more capacity, proven PMAG reliability, and a magazine that still handles like a magazine — not a dinner plate hanging off the rifle.


Fitment

  • Fits AR-15/M4 compatible rifles using STANAG-pattern magazines.
  • Built for 5.56x45 NATO and .223 Remington.
  • Optimized for Colt-spec AR-15/M4 platforms.
  • Modified internal and external geometry supports wider compatibility with platforms such as HK416, MR556, M27 IAR, British SA-80, FN SCAR MK16/16S, and similar compatible STANAG-pattern firearms.
  • Designed with an over-insertion stop to help prevent over-travel on compatible platforms.

Does NOT Fit

  • Not for AK-pattern rifles.
  • Not for AR-10/LR-308 platforms.
  • Not for pistol-caliber carbines.
  • Not for Glock, SIG, Scorpion, MP5, or Colt-pattern 9mm magazine systems.
  • Not for restricted states or jurisdictions where 40-round magazines are prohibited.

What It Does

  • Provides 40-round capacity for compatible 5.56 NATO/.223 Remington rifles.
  • Uses next-generation impact and crush-resistant polymer construction.
  • Constant-curve internal geometry supports smooth feeding.
  • Anti-tilt, self-lubricating follower helps improve feeding reliability.
  • Aggressive front and rear texture improves grip during reloads and handling.
  • Removable floorplate helps with cleaning and maintenance.

Why It’s Worth It

The PMAG 40 gives AR shooters more capacity without going full drum. It is still slim enough to handle naturally, gives you 10 more rounds than a standard 30, and keeps the proven GEN M3 features that made PMAGs a standard instead of a gamble.


Specs

  • Brand: Magpul Industries
  • Model: PMAG 40 AR/M4 GEN M3
  • Magazine Type: Rifle magazine
  • Caliber: 5.56x45 NATO/.223 Remington
  • Capacity: 40 rounds
  • Platform: AR-15/M4 compatible rifles
  • Material: Polymer body
  • Follower: Anti-tilt, self-lubricating follower
  • Color: Black
  • Manufacturer Part Number: MAG233-BLK
  • UPC: 873750009698

Verify Before You Buy

  • Verify your firearm accepts AR-15/M4 STANAG-pattern magazines.
  • Verify your rifle is chambered for 5.56 NATO or .223 Remington.
  • Verify your state and local magazine capacity laws before ordering.
  • Buyer is responsible for compliance with all local/state laws regarding magazine capacity.

Helpful Buying Paths

Browse AR platform parts, compare Magazines & Extensions, check related related magazines, or shop Adult Legos gear for compatible parts and accessories.


Disclaimers

⚠ Trademark & Compatibility Disclaimer

IronKells Armory LLC is not affiliated with, endorsed by, or sponsored by any manufacturer mentioned. All trademarks are the property of their respective owners and are used only to identify compatibility or fitment.

Buyer is responsible for compliance with all local/state laws regarding magazine capacity.

⚠️ LEGAL DISCLAIMER

Don’t be that guy ordering 30-round mags in ban states. We don’t ship to restricted zones unless you’ve got the paperwork and Odin’s blessing. You’ve been warned.

Note on Shipping

⚠️ High-capacity magazine laws suck, and unfortunately this item cannot ship to CA, CO, CT, DC, HI, IL, MA, MD, NJ, NY, RI, WA, VT, or other restricted states. Adult signature required where applicable.

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