Magpul PMag 40-Round Magazine for AR-15

The Magpul PMAG40 is an extended capacity magazine for the AR-15 and any firearm designed to accept standard AR-15 magazines. Recognizing a need for an extended capacity magazine, Magpul did what they do best and developed an extended capacity magazine based on the original PMAG. With the dimensions and feeding geometry being identical to the PMAG, the PMAG-40 will provide the same level of performance and reliability that Magpul is known for.

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American Owned and Operated


20+ Years In Business

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Ships from Pennsylvania


There are times when a standard capacity 30-round magazine will do and there are times when you'd like just a bit more magazine capacity. Now that Magpul has released the PMAG40 you can have an extra 10 rounds of 5.56 ammunition available before you need to change magazines. Far from being just an extra ten rounds however as the PMAG40 enjoys the same reliability and performance as the original PMAG-30.

Magpul Industries has been innovating in the development of firearms magazines since the very first PMAG was released. The brand new PMAG40 builds upon this history and commitment to customer satisfaction, equipment reliability, and performance. You can count on each and every time you load your PMAG40 that when you are at the gun range it will fit and feed all rounds from your AR-15 type firearm.

  • Magpul Produced Magazine
  • 40-Round Capacity
  • 5.56x45mm NATO / .223 Remington Caliber
  • Works in AR15, M16, M4, HK 416, FN SCAR 16, SA-80 and M27 Rifles
  • Generation M3 Magazine
  • Complete with Dust Cover

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Customer Reviews

Great Company
Review by Tyrae M.
Verified Buyer
I ordered three mags and they all work.
Review by Campbell L.
Verified Buyer
Received in two days after ordering. Will be back to shop at keepshooting.
Great product
Review by Alfredo O.
Verified Buyer
Fast shipping and fit like a glove!! Not a bad price either.
Good for me
Review by Ceferino Z.
Verified Buyer
Price is great and shipping was fast.
Great Mag at a great price
Review by Jahmal D.
Verified Buyer
Pricing was excellent and product was what you expect from Magpul....solid. Long doggone thing, but nice for non-prone shooting.
Quick Delivery
Review by Mariano P.
Verified Buyer
Received in two days after buying. Will be back to shop at Keepshooting.
Perfect for my use
Review by Elmo V.
Verified Buyer
Clips look great. Exactly what I needed.
Great Price
Review by Garth Y.
Verified Buyer
I purchased four clips and they all work.
Quick Shipping
Review by Eddrick M.
Verified Buyer
The mags are good. Would buy again.
THANKS keepshooting
Review by Martrell B.
Verified Buyer
Received in three days after placing my order. Will be back to buy from Keepshooting again.
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