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Ar-15 Gas Block Mk12 - Ar-15 Gas Block Mk12 .875 Ss Ss
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$68.99
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SKU: 093000027
Overview
This low-profile gas block is intended for rifles set up with optics or free-float handguards, where extra clearance at the front end matters. It serves as a replacement for a factory front sight gas block and comes with set screws, a gas tube mounting pin, and installation instructions. The Mk 12 style is presented as an exact copy of the gas manifold used on the Mk12 Mod 1 and Mk 18 Mod 1 Special Purpose Rifles, and the .875" version is offered in a natural stainless finish. For builders looking for a streamlined front-end component with a reduced-profile appearance, it provides a purpose-built option without adding unnecessary bulk.
Why Hunters Choose the Badger Ordnance
Slim, Low-profile
Design provides maximum clearance for
Streamlined Profile
Reduces forward weight on the
Includes Set
Screws, gas tube mounting pin,
Made From
A black oxide finish
Mk 12
Version fits .750-inch O.D. barrels;
Key Features
- Slim, low-profile replacement for factory front sight gas block.
- Provides maximum clearance for optics and free-float handguards.
- Streamlined profile reduces forward weight.
- Includes set screws, gas tube mounting pin, and installation instructions.
- Made from 416 stainless steel with a black oxide finish.
- Fits barrels with .875" O.D.
Best Used For
- Rifle builders needing low-profile gas block clearance for optics and free-float handguards
- Owners replacing a factory front sight gas block on compatible AR-15 barrels
- Users assembling a Mk12 Mod 1 or Mk18 Mod 1 style rifle
- Hunters wanting a streamlined front end with reduced forward weight
- Builders requiring included set screws, gas tube pin, and installation instructions
Pros
- Slim, low-profile design provides maximum clearance for optics and free-float handguards.
- Streamlined profile reduces forward weight on the rifle.
- Includes set screws, gas tube mounting pin, and installation instructions.
- Made from 416 stainless steel with a black oxide finish.
- Mk 12 version fits .750-inch O.D. barrels; Mk 12 Style fits .875-inch O.D. barrels.
Considerations & Trade-offs
- This is a low-profile gas block replacement, so it is intended for rifles set up for optics or free-float handguards rather than a factory front sight configuration.
- Fit is barrel-diameter specific: the Mk 12 version is for .750" O.D. barrels, while the Mk 12 Style version is for .875" O.D. barrels.
- The two versions differ in finish as well as fit, so matching the correct model to your barrel and preferred appearance matters.
- Installation hardware and instructions are included, but the product is still a replacement component that requires proper installation and setup.
Suggested Comparisons
- AR-15 gas blocks
- Low-profile gas blocks
- Free-float handguard-compatible rifle components
- AR-15 rifle accessories
Suggested Accessories
- Gas block installation tool
- Gun vise
- Torque wrench
- Thread locker
Frequently Asked Questions
What barrel size does this gas block fit?
The product data lists two versions: the Mk 12 fits .750" O.D. barrels, and the Mk 12 Style fits .875" O.D. barrels.
Is this a low-profile gas block for use with free-float handguards?
Yes. The description says it is a slim, low-profile replacement for a factory front sight gas block and provides maximum clearance for optics or free-float handguards.
What is included with the gas block?
Set screws, a gas tube mounting pin, and installation instructions are included.
What material and finish are listed for this gas block?
The product data lists 416 stainless steel. The Mk 12 version has a black oxide finish, while the Mk 12 Style version is listed with a natural silver finish.
Is this a standard gas block or a Mk12-style part?
The description says the Mk 12 is an exact copy of the gas manifold on the Mk12 Mod 1 and Mk 18 Mod 1 Special Purpose Rifles used by the U.S. Army and Navy. The Mk 12 Style is described as having the same low profile as the Mk12 Mod 1 gas manifold.