The Yankee Hill Machine Gas Block (brand part no. YHM-9384) is a low-profile, clamp-on gas block made in the USA and sized for a .750-inch barrel journal. It replaces the front sight base to give the barrel a simple, low-profile mounting point, which lets you run a rifle-length handguard over a carbine-length barrel. Yankee Hill finishes the block in black phosphate steel and secures it to the barrel with two clamping screws that take a 9/64-inch Allen wrench. It is a straightforward upgrade for anyone converting a front-sight-equipped upper to a free-float handguard setup.

Key Specifications

• Low-Profile Design sits underneath a free-float handguard.
• .750-Inch Barrel Journal Fit matches common carbine-profile AR-15 barrels.
• Clamp-On Mounting secures with two clamping screws rather than pins.
• 9/64-Inch Allen Wrench Required for the two clamping screws.
• Black Phosphate Steel Construction resists wear under sustained firing.
• Front Sight Base Replacement removes the need for a front sight tower.
• Enables Rifle-Length Handguards by clearing the way for a longer free-float rail over a carbine-length barrel.
• Made in USA manufacturing.
• AR-15 Platform Compatibility fits standard AR-15 upper builds.

Frequently Asked Questions

What barrel diameter does this gas block fit? A .750-inch barrel journal.

How does it mount to the barrel? With two clamping screws that take a 9/64-inch Allen wrench.

Buy the Yankee Hill Machine Gas Block

Convert your barrel to a low-profile gas block with this Yankee Hill Machine block from our AR gas system selection. Order online and we will ship it straight to your door from our Lubbock, Texas gun shop.