Faxon Firearms Ultra Low-Profile Gas Block

Faxon Firearms Ultra Low-Profile Gas Block

Product Code:
FAX-GB-LP-625-3 (750-3)
Calculated at Checkout
$28.49 - $34.19

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


  • Any AR-15 and AR-10 barrel that has a .625" or .750" diameter at the gas port area.


  • 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.

Write a Review

8 Reviews

  • Faxon Firearms ultra low pro Gas Block

    Posted by Bea on 23rd Nov 2021

    Looks nice fits nice works nice, nice price.

  • Gas block

    Posted by Rick on 2nd Apr 2021

    Fit perfect, 3 set screws. Nice and light.

  • AR Build

    Posted by Jonathan on 6th Aug 2020

    Fits perfectly. Fast shipping, great service. recommend

  • Faxon is Superb

    Posted by OE on 21st Apr 2020

    Everything Faxon makes is awesome. Works great and looks great. No issues.

  • Great gas block

    Posted by Kevin on 11th Jul 2019

    I am pleased with this gas block, sturdy, mounts securely, light weight.

  • Faxon Firearms gas block .750

    Posted by Jesse Mendiola on 27th Jun 2019

    A great addition to my recent build. It’s paired with a 223 Wylde 16” Faxon Firearms Flame Fluted Barrel. Quality of gas block is top notch. Did not have to dimple my barrel in order for it to stay in place even after a hard long day at the range. Fits perfectly within my 15” Aero Precision Atlas S-One Handguard. Thank you Wing Tactical for delivering another great product.

  • Ultra low profile gas block

    Posted by Naly Sonethanouvong 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.

  • Will buy again

    Posted by Cole 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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