Faxon 3 Screw .625” Low Profile Gas Block

(49 reviews)
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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. 

Product Type:
Gas Block


  • 5
    very nice product and very well made

    Posted by Jerry J Jacques on May 24th 2023

    Perfect for building a light weight AR.

  • 5
    Gas block

    Posted by Robert on Feb 26th 2023

    Low profile was correct. It fit perfect over my faxon pensil barrel. Fit was great and it shot like a dream.

  • 5
    Low pro gas block

    Posted by Justin on Dec 26th 2022

    This part arrived in a timely manner and was beautifully machined. It was also about half the weight of the other low pro gas blocks ive used in the past. I also like the fact that it has three set screws which gives a little more secure fit whether its needed or not i dont know. The block was mated with an 18" 5.56 Gunner barrel which was also of top notch quality. These are the first products ive purchased from Faxon, they now have a new customer.

  • 5
    Good, lightweight gasblock

    Posted by Tim on Jun 2nd 2022

    I was surprised how well machined and lightweight this gas block is. Fit on the barrel was perfect and installation was easy.

  • 5

    Posted by Son of slaughter LLC on Apr 29th 2022

    This thing is pretty slick. I really like the three locking screws compared to other companies that only have 2. Run it. Gun it. And don’t worry about it coming loose.

  • 5
    Light weight, great finish

    Posted by Kenneth Taylor on Feb 23rd 2022

    Fit was good, looked nice thru the hand guard, will buy again.

  • 5

    Posted by Jonathon Hurley on Sep 16th 2021

    I have several of these. They are lightweight and work great. No issues. I recommend.

  • 5
    What a great low-profile gas block for the .625" pencil barrel.

    Posted by Mike on Jun 11th 2021

    This gas block is slim and compact, yet has three set screws to assure that it never comes loose. Love it!

  • 5
    Good quality, Lightweight.

    Posted by Drake on Nov 26th 2017

    Very nice product, good price.