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    We Ship Fast!

    Order by 1PM CST for Same Day Shipping (Mon-Fri)

    This premium Steel Micro Gas Block comes in 4 sizes: .625", .75", .875", and .936".

    We have a fit for every barrel!


    • 4 sizes available: .625", .75", .825", and .936 (.75" is the most common size, but always measure the barrel if you aren't sure!)
    • Low profile design, perfect with our free floating handguard
    • Steel construction (better than aluminum for withstanding extreme temperatures)
    • Secured using 2 set screws (screws, allen wrench and roll pin included)
    • Backed by the AT3 Lifetime Warranty


    • Material: 4150 Steel, Black Finish
    • Length: 1"
    • Height: Sits 3/8" off of the barrel (fits under all free float handguards!)
    • Weight: 1.5-1.8oz depending on size
    • Packaging: PE Bag

    Frequently asked questions: 

    Q: How can I tell what size of gas block I need?
    A: The gas block size is based on the outside diameter of your barrel. The most common size is .75" (this is the military standard). If you aren't sure - use calipers to measure  the diameter of the barrel, in the area where the gas block sits. Or alternatively, you can try looking up the make and model of your rifle online for more details. 
    Q: How do I know if this gas block will fit under my handguard? 
    A: Our micro gas blocks are as small as you will find on the market. They are guaranteed to work with our AT3 handguards, and they should be compatible with all the other handguards out there!

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    Customer Reviews

    Based on 53 reviews
    Fast service

    Exactly what I was looking for. A very reasonable price. Fast service expected and delivered

    Thanks for sharing your feedback, Dwayne. We're glad you're satisfied with your purchase. - AB
    Nice producr

    Easy to put on, works great

    Thanks for spreading a good word for AT3, Lee. We're glad you're satisfied with your purchase - AB
    Great gas block worked perfectly

    I put this on a DPMS barrel with a much larger block because I was installing a Spear Free Float Hand Guard and it was super easy and fit perfectly!!!! 3 magazines through it so far and it worked flawlessly!!!! Highly recommend the gas block hand guard and AT3 Tactical!!!!!

    We appreciate your feedback, Joe! Glad you liked your purchase. -- LM
    Rock solid

    Not much to say here except this is a simple, rugged product. Good finish, minimal took marks, great fit and a decent price... A1 in my book.

    We're glad to hear you're happy with the product, Josh. Thank you for the feedback! -- LM
    Works as intended

    Installed in no time. Fits perfectly under my new handguard. The product i received did not have the milled flutes on the side as shown in the picture though. No biggie.