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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 55 reviews
    Great stuff, better price

    Ordered the low profile gas block and 12" quad rail....awesome product and great quality without breaking the bank

    Thanks for sharing your feedback, Bobby. We're glad you're satisfied with your purchase. - AB
    Never received. MIA

    Been almost 2 weeks since ordered and tracking shows accepted but not even in transit. Contacted AT3 twice and they don't know what happened to it. Been waiting on this part to install floating hand guard. Don't wish to purchase from another company but might be the only choice.

    We appreciate your feedback, Kirk. As mentioned in our email yesterday, we already reshipped your order with UPS. The tracking info was sent to your email. - AB
    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