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. 


  • 5
    Good quality1

    Posted by rolex.smoke@gmail.com on Nov 8th 2017

    Light weight and great quality!

  • 5
    .625" Ultra Low-Profile Gas Block

    Posted by Steve Fay on Sep 20th 2017


  • 5
    If you're looking for a lightweight, low profile, 3 setscrew, .625, quality made gas block, you've found your part.

    Posted by Jimmy Sweatt on Jul 26th 2017

    Excellent quality! Very well made.

  • 5

    Posted by Scott on Jun 7th 2017

    Great choice for Faxon's lightweight, pencil barrel.

  • 4
    .625 block

    Posted by Greek on May 22nd 2017

    Super nice,2nd one that I purchased from Faxon,I really like there products. Will be on #3 too!!

  • 5
    nice, light,easy to install gas block

    Posted by Jon C on Apr 29th 2017

    installed easily with three set screws, was easy to align and functions perfectly, also matches the qpd barrel very well

  • 5
    Great gas block!

    Posted by Jeffrey Mitchell / SRTLLC on Feb 28th 2017

    This is my eight custom build using the Faxon gear! I'm extremely please with the quality workmanship of the products. The Ultra low profile gas block is exactly what is advertised! Super low and light weight, having three set screws instills much confidence as well!

  • 5
    Super Nice Gas Block ! !

    Posted by Chris on Feb 1st 2017

    Nice machine work on this gas block

  • 5
    great gas block

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

    Fits great under my G3 light weight MI rail