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Faxon Firearms Ultra Low-Profile Gas Block

  • Faxon Firearms Ultra Low-Profile Gas Blocks
  • Faxon Low-Profile 0.750 Gas Block
  • Faxon Low-Profile 0.625 Gas Block
  • Faxon AR-15 Gas Block
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Faxon Firearms Ultra Low-Profile Gas Block

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$35.99 $28.49


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MPN: GB-LP-625-3 / GB-LP-750-3


  • Low-profile design perfect for rail system
  • Weight saving drilled through design
  • 3 set screws for secure mounting
  • Made in U.S.A.


  • Material: Steel
  • Finish: QPQ Nitride
  • Length: 1"
  • Height: 
    • 0.750 Model: 1.35"
    • 0.625 Model: 1.29"
  • Width:
    • 0.750 Model: 0.9"
    • 0.625 Model: 0.78"
  • Weight: 1.13 oz.
  • Fit: .750" or .625" diameter barrels


  • 1x Faxon Low-Profile Gas Block
  • 3x Gas block set screws


When you really want to master a rifle that functions on gas impingement, you need to install a quality gas block. The problem is, a lot of gas blocks just aren’t compatible with the best feeling handguards. There just isn’t enough clearance under many of today’s ergonomically designed forends for them. What you need is a quality, low profile gas block. The Faxon firearms Ultra Low-Profile Gas Block is just what you need to fit the bill and your hand guard.

Faxon Quality

Faxon gas blocks are manufactured from excellent quality steel and finished in the same lustrous black finish that Faxon uses on their barrels. Faxon Gas blocks are designed to work for lightweight, low profile builds so the barrel path is directly through the center of the block. A three-point Allen key fastening arrangement tightens the block in place.

Choose Your Diameter

Faxon Firearms offers their Ultra Low-Profile Gas Blocks to fit both .625” and .750” barrel diameters, simply choose the one you need. They accommodate any .625” or .750” barrel with a standard sized gas journal. These gas blocks stand just an inch and 7/32 tall, so they should fit under pretty much any rail you choose.

Installation Tips

Faxon Firearms wants you to have the best possible experience with tier Ultra Low Profile Gas Blocks. To that end, they offer a couple of reminders: The use of an appropriate thread locker for the heat of an active firearm is advised as added insurance to the security of their 3-point Allen screw tightening arrangement. Faxon does not include roll pins with their gas blocks. When you purchase your gas tube please make sure you also receive a roll pin.

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  1. Ultra low profile gas block 5 Star Review

    Posted by on 22nd Jun 2018

    This Faxon gas block works great with my Off Hand Gear free float handguard. Easy installation on my 16" barrel. Has 3 set screws to ensure that it doesn't come off when shooting. Made with high quality materials. Highly recommend for a light weight AR build.

  2. Will buy again 5 Star Review

    Posted by on 26th Jan 2018

    Even if you aren’t mating this to a Faxon barrel like I did, this gas block is awesome. Holes are measured precise, I mic’d them, and the finish is superb. The cutouts not only reduce weight, but look awesome against any barrel of another color. Fits under my Aero slim handguard, 1.3” inner diameter. And WT got it to me faster than Amazon Prime gets to me.

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