0 Cart
Added to Cart
    You have items in your cart
    You have 1 item in your cart
    View Cart / Checkout Continue Shopping

    We Ship Fast!

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

    The AT3 Long Low Profile Gas Block is designed to cover up barrel scars that are left after removing an AR-15 front sight base


    • 3/4" (.75") size – works with any .75" AR-15 barrel

    • Perfect for use with long AR15 handguards that cover the gas block

    • Length is designed to cover up blemishes on barrel after removing front sight base

    • Secured with 3 set screws (screws, allen wrench and roll pin included)

    • Backed by the Lifetime AT3 Warranty


    • Material: 4150 steel

    • Finish: Phosphate coating (matte black)

    • Length: see pictures

    • Inside Diameter: .75"

    • Weight: 2.7oz

    • 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!

    Have Questions About this Product?

    Ask Us Now

    Customer Reviews

    Based on 28 reviews
    Gas block

    Can’t say anything negative about it. It just works great and easy installation.

    Gas Block

    Great price easy install very satisfied with product

    Thank you for the feedback Tommy! We appreciate it
    Gas block

    Gas block was great, the gas tube pin was not had to use a pin I already had to secure gas tube.

    Thank you for the feedback, Roger. We're investigating these pins a little closer and considering a change.
    Great product, quick delivery

    I needed this gas block to complete my latest build. I removed the front iron sight, but I wanted to cover up the pin holes in the barrel. Shipping was faster than it I thought it would arrive. The description was perfect. Went right on the barrel and worked exactly as I had expected. Thanks!

    Thank you for the feedback, Chris!
    Good product

    Finish on it seems like it might wear down easily. Pins didn't fit, but they sent me new ones that worked fine. I would suggest they send the better pins first not the cheap ones with coating that gets it the way of the pressed fit. They got me new pins though so can't complain and the length should be about another 1/16 to 1/8 inch long to cover all the bare metal on the barrel that is showing from removal of front sight post. Everything else i am pleased with and great product. Exceptional customer service as well! Thanks AT3!

    We are sorry to hear this didn't match what you were really looking for. If you are still not pleased with the length we could do an exchange for the long gas block.