.625" Ultra Low-Profile Gas Block - Three Set Screws

.625" Ultra Low-Profile Gas Block - Three Set Screws

(41 reviews) Write a Review

Perfect for any rail system, these ultra-low profile gas blocks are the ideal companion for Faxon Firearms (or any other) barrels with a standard  diameter gas journal. Made from high-strength steel, all our gas blocks are a matching black luster to our barrels. 

For lightweight builds, the block is drilled through the middle of the profile. The gas block clamps on to the barrel using 3 allen keys on the bottom of the block. 

*Faxon Firearms highly recommends the use of Loc-Tite or similar thread-locking compounds. Gas blocks will get very hot, so pick a compound according to your intended use of the firearm. 

Specifications (.625"):

  • Barrel Compatibility: .625"
  • Weight: .07 Lbs
  • Width: 1.00"
  • Height: ~1 & 7/32" 
  • Mounting: 3x Screws (Allen Key interface)

Gas block does not include the gas tube roll pin. Faxon includes gas tube roll pins with gas tubes. 

Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

41 Reviews Hide Reviews Show Reviews

  • great gas block

    Posted by heisman01@hotmail.com on Feb 1st 2017

    Fits great under my G3 light weight MI rail

  • easy fit, loved how easy it was to install.

    Posted by Unknown on Jan 20th 2017

    Great fit, lightweight.

  • perfect fit

    Posted by jake on Jan 10th 2017

    I found this gas block to be light in weight, a good snug fit, and also I like the triple locking set screws at the bottom to ensure it stays on.
    I installed this on one of their pencil barrels.
    It is so light weight ,these two products ( Faxon pencil Barrel, and low profile gas block) made an awsome build.
    I look forward to using more of their products in the future.

  • Very nice fit and finish

    Posted by Unknown on Dec 27th 2016

    I have used these before on a build for my son. Very nice. Solid mounting with 3 screws.

  • Even nicer then expected.

    Posted by Thomas on Nov 29th 2016

    I was very very impressed with this gas block. Most companies .625 gas blocks are just a standard gas block but with the hole drilled smaller. These are actually smaller all around saving even more weight. Awesome fit and finish. I would recommend these to anyone looking for a gas block for a .625 barrel.


    Posted by Unknown on Nov 25th 2016

    Hey this gas block looks great and fits well. Haven't had a chance the to go to range but so far two out of three, not bad

  • Fit perfectly with super slim hamdguard

    Posted by Walt Meyer on Nov 15th 2016

    Ordered this gas block to go with the Faxon 16" pencil barrel of ordered from another company. It fit perfectly and it's small size allowed me to use a very slim and light handguard so the build came in at only 6.2 pounds. Fast shipment by Faxon. It functioned flawlessly when I took the rifle out the next day for the first 100+ rounds.

  • awesome gas block!

    Posted by Unknown on Sep 22nd 2016

    Love the 3 set screw design. The most important piece in the gas system 3 screws are better than 2! Tight fit for the gas tube & snug fit on the barrel. All three tolerances are perfect.


    Posted by Unknown on Sep 5th 2016

    The gunsmith that did the barrel change commented he really liked because of the 3 mounting screw rather than the normal 2

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