Yankee Hill Machine Gas Block Low Profile Set Screw AR-15, LR-308 Standard Barrel 0.750" Inside Diameter Steel Matte

The Yankee Hill Machine low profile set screw gas block is a straightforward, no-frills solution for AR-15 and LR-308 builds where you need to run a rifle-length handguard on a carbine-length barrel. Built from steel with a mil-spec phosphate finish, it's designed to mount directly to your barrel via two set screws—a simple, reliable method that doesn't require permanent installation or specialized tools. If you're building a compact rifle, converting an existing upper, or just want a clean, low-profile gas block without the bulk of traditional front sight posts, this Yankee Hill option delivers the functionality serious builders expect.

The 0.750-inch bore diameter makes this block compatible with standard AR-15 and LR-308 barrel profiles. Its low profile design won't interfere with modern handguard systems, making it a practical choice for free-floating forearms and tactical setups where sight clearance matters. The steel construction and phosphate coating are proven for durability in field and range use, and the set screw mounting method gives you the flexibility to adjust or remove it without permanent modification to your barrel.

Whether you're a competition shooter optimizing your build, a hunter looking to maximize handguard length on a shorter barrel, or just someone who appreciates simple, effective engineering, the Yankee Hill low profile gas block does its job without unnecessary complications or excess weight.

Key Features

• Low profile design allows rifle-length handguard installation on carbine-length barrels
• Set screw mounting—no permanent modifications or specialized installation required
• Compatible with AR-15 and LR-308 platforms
• 0.750-inch bore diameter for standard barrel profiles
• Steel construction with mil-spec phosphate finish for durability
• Minimal profile for modern free-floating handguard systems

Specifications

Frequently Asked Questions

What barrel profile does this gas block fit?

The 0.750-inch bore diameter is designed for standard AR-15 and LR-308 barrels. Verify your barrel's gas block journal diameter before purchasing to ensure proper fit.

Can I install this without permanent modifications?

Yes. The two set screws secure the block to your barrel without requiring drilling, welding, or other permanent changes, making it easy to adjust or remove.

Will this work with modern free-floating handguards?

Its low profile design is intended to work with rifle-length handguards on carbine-length barrels and won't interfere with free-floating forearms on standard setups.

What finish does it have?

The gas block is finished with a mil-spec phosphate coating in matte for durability and corrosion resistance in field and range use.