Faxon Firearms Adjustable Gas Block, AR-15, .750″ ID, Matte, Black

Original price was: $89.00.Current price is: $82.00.

This patent-pending adjustable gas block offers 14 tactile detented settings and a fouling-resistant screw placement for .750″ AR-15 barrels, matte black finish.

Faxon Firearms Adjustable Gas Block, .750″ ID, Matte Black

This patent-pending adjustable gas block gives you 14 tactile, detented settings so you can dial in gas flow precisely whether running suppressed or unsuppressed. Faxon’s unique screw placement keeps carbon away from the adjustment mechanism, preventing fouling and seizing over extended use, and the low profile body clears most free-float handguards on .750 AR-15 barrels.

Need the smaller journal size? See the .625″ ID version, or browse more adjustable gas blocks.

Key Features

  • Patent pending low profile adjustable gas block for .750″ AR-15 barrels
  • 14 tactile, detented adjustment settings
  • Unique screw placement prevents gas port carbon contact — no fouling or seizing
  • Works suppressed and unsuppressed
  • Low profile design clears most free-float handguards
  • Matte black finish

Specifications

UPC 816341028265
Manufacturer Faxon Firearms
Manufacturer Part # GBA-LP-750-3
Model Adjustable Gas Block
Type Gas Block
Diameter .750″
Settings 14 Tactile, Detented
Fit AR-15
Color Black
Finish Matte
Subcategory Long Gun Parts

What’s Included

  • 1x Faxon Firearms Adjustable Gas Block, AR-15, .750″ ID, Matte, Black
Weight 0.5 lbs
Type

Gas Block

Model

Adjustable Gas Block

Diameter

.750"

Settings

14 Detented

Fit

AR-15

Color

Black

Finish

Matte

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Frequently Asked Questions

What does .750″ ID mean on a gas block?

The .750″ ID (inner diameter) refers to the bore of the gas block — it is designed to fit barrels with a .750-inch outside diameter at the gas block seat. This is the most common diameter on mil-spec government-profile and M4-profile AR-15 barrels. Measure your barrel’s gas block journal before ordering to confirm compatibility.

What is the advantage of an adjustable gas block?

An adjustable gas block lets the shooter tune the amount of gas bled from the barrel to cycle the action. This is useful for suppressed shooting (which increases backpressure), shooting suppressed and unsuppressed with the same rifle, and optimizing reliability with different ammunition loads or buffer weights.

How is the Faxon adjustable gas block installed?

The Faxon adjustable gas block replaces the existing gas block on the barrel and is secured via set screws. The barrel journal must be the correct diameter (.750″ for this model), and the gas port on the block must be aligned with the barrel’s gas port before tightening. A free-float handguard is typically required to access an adjustable gas block after installation.