The Faxon low profile adjustable gas block in .750 hands AR-15 shooters full command of their gas system on the most common barrel journal size. This three-screw model uses a patent-pending design with 14 tactile settings, letting you tune cycling, recoil, and reliability instead of living with a factory-fixed port. For anyone running a .750 barrel that feels overgassed, this is the fix.
What the Faxon low profile adjustable gas block is and who it is for
Sized for .750-inch gas journals, this block fits the government and medium-profile barrels that make up the bulk of AR-15 builds. It is ideal for shooters who move between suppressed and unsuppressed fire and need to manage the extra gas a can sends back. Open it up for unsuppressed reliability, then throttle it down under a suppressor for a softer, cleaner shooting experience.
Suppressor owners, competition shooters, and precision builders will all benefit. The Faxon low profile adjustable gas block makes tuning a .750 barrel simple and repeatable.
Key features
- Compatible with .750-inch barrel gas journals on government and medium-profile barrels
- 14-position adjustable gas flow for optimal cycling and recoil control
- Patent-pending design that prevents carbon fouling of the adjustment screw
- Machined from high-strength steel with a corrosion-resistant black luster finish
- Secured with three set screws in a slim, free-float-friendly profile
Specifications and materials
The Faxon low profile adjustable gas block is machined from high-strength steel and finished in corrosion-resistant black luster, so it withstands the heat that collects at a hard-working gas port. Its patent-pending adjustment mechanism resists the carbon fouling that seizes up lesser adjustable blocks, keeping your settings usable long term. That reliability is exactly what an adjustable block needs to earn a spot on a serious rifle.
The 14 tactile positions give you audible, repeatable clicks so you can note a setting and return to it later. Three set screws lock the block to the .750 journal, and the low-profile shape keeps it hidden under standard free-float rails.
The .750 journal is the most common size in the AR-15 world, which makes this adjustable block one of the most broadly useful tuning upgrades you can buy. Overgassing is the default state of many factory rifles, and it shows up as heavy recoil, violent ejection, and premature wear. Throttling the gas back to just enough for reliable function calms all of that down. The 14 tactile detents make the process methodical rather than a matter of trial-and-error guesswork.
Installation, care, and compatibility
Installation follows the familiar routine. Clean the .750 journal, seat the block over the gas port, square it, and torque the set screws with thread locker for a lasting hold. Tune by closing the gas until lockback stops, then opening a couple of clicks for a dependable margin, and log a second setting for suppressed use.
Care is minimal because the fouling-resistant screw stays free, though a quick wipe during cleaning never hurts. This Faxon low profile adjustable gas block works with standard AR-15 gas tubes and free-float handguards, dropping cleanly into most builds. Check our parts and upgrades catalog for the gas tube and rail to complete the job, backed by the Faxon reputation for parts that perform.
Suppressor owners get the biggest benefit, since a can dramatically increases back pressure and gas to the face. Setting one position for unsuppressed fire and another for suppressed use gives you the best of both worlds from a single rifle. The fouling-resistant screw means those settings stay usable trip after trip instead of seizing up. Whether you are chasing flatter recoil for competition or a cleaner shooting experience with a can, dialing the gas is one of the highest-value tuning moves on an AR-15.
Take control of how your rifle runs with the Faxon low profile adjustable gas block and enjoy smoother, tuned performance. Ships direct to your door, no FFL required.
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