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High-Capacity Magazine, 100-Round

MAG5-100 High-Capacity Magazine, 100-Round, for AR-15 variants

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great magazine

I shoot out of mine on full auto and single shot. Works perfect every time. I love my SureFire mags.

Reviewed by paul (Posted on 7/8/14)


Very good product. Built well. It sure safes a lot of time loading and unloading magazines. Very happy with product.

Reviewed by Doug Bergener (Posted on 2/12/14)

Very Surprised

I really love this product, but was very, VERY surprised to see it in
Sportsmans Guide catalog for much less money. Same for sixty round. Just telling it like it is.

Reviewed by Johnny (Posted on 1/22/14)


Best 100 round magazine on the market. Why but a Volkswagon, when you can have a Ferrari. I would still buy this magazine, but I would buy from a commercial vendor. I payed $199.00 to Surefire, when I later discovered that I could have purchased this magazine from my local firearms dealer for $169.00. This is a quality and reliable product, and I would refer this product to shooters that appreciate the best.

Reviewed by GGladding (Posted on 11/28/13)

Reliable Performer Finally arrives

Many have tried to stretch the capacity of the typical 30 round M4/M16 AR style rifle by making drums or curling out the feeders to the side. It took a serious company with the engineering capability and interest in performance over market demands like Surefire to take the time to create a true hi-capacity 5.56 magazine that performs as well or better than the best PMags and other 30 round magazines that the rifle was made to accept.

First with the 60 round version and now with the 100 round version, Surefire worked with the design of the original Colt on which every AR variation is based and put together a magazine that works with the rifle, the way the rifle was intended to operate. I'm no engineer, but it strikes me that the feeder spring system and the follower took time to perfect for first double and now more than triple capacity of the original magazines, but in the same design and operating system as the best 30 magazines. It was time well spent by Surefire and now their magazines are a lot of quality for the price, particularly given the reliability and performance that you get in return. Great job, SureFire! It was worth the wait!

Reviewed by (Posted on 11/16/13)

best spec ops mag in world

trusted manufacturer. very good to excellent rating,even on full auto.

Reviewed by denbectec (Posted on 10/29/13)

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Length 12.20 inches
Width 1.66 inches
Weight Empty 9.6 ounces
Weight Loaded 3.3 pounds


MAG5-100 84871315821
The SureFire high-capacity magazine for 5.56x45 mm (.223 Remington) ammunition, also available in a 60-round version, is compatible with M4/M16/AR-15 variants and other firearms that accept standard STANAG 4179 magazines. Constructed from Mil-Spec hard-anodized aluminum, they feed smoothly and reliably due to optimal geometry, non-binding coil springs, and ingenious nesting polymer followers. The long-lasting springs are cadmium coated for low friction and excellent corrosion resistance. Magazines require no lubricants and can be easily disassembled without tools for cleaning.

SureFire High-Capacity magazines provide distinct tactical advantages: increased initial firepower in ambush situations; fewer reloads overall, which means less downtime and target distraction in a firefight; fast and easy magazine insertion, even with a closed bolt; less bulk compared to drum mags, enabling a normal weapon grip.

Learn more — Firepower Comparison Charts.
  • Compatible with all weapons that accept standard STANAG 4179 compliant magazines
  • Reliable functioning due to mechanical simplicity and high-quality non-binding coil spring—no lubricants required
  • Long-lasting springs are cadmium coated for low friction and excellent corrosion resistance
  • Easily seated in weapon with bolt forward
  • May be kept fully loaded for extended periods without spring fatigue
  • Only 1.66" thick, less than two 30-round magazines clipped together
  • 100-round magazine fits in optional MOLLE-compatible pouch


    Illinois Ship To addresses must call 800-828-8809 to place orders. Cook County and City of Aurora are prohibited.

    ITAR Notice
    Export of the commodities described herein is strictly prohibited without a valid export license issued by the U.S. Department of State, Office of Defense Trade Controls, prescribed in the International Traffic in Arms Regulation (ITAR), Title 22, Code of Federal Regulations, Parts 120-130.

    Restricted Shipping
    Due to potential conflict with state and local laws, we do not ship high-capacity magazines to individual purchasers in certain cities or in the states listed below. However, you may be able to purchase them from a local SureFire Dealer. Magazines ordered through cannot be shipped outside the U.S.

    Illinois Cook County and City of Aurora
    New Jersey
    New York
    Washington D.C.

Related Information

Warning: Non-Removable Illumination Tool Heads

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SureFire is Designed and Built in the USA