The YHM Diamond Series Forearm (brand part no. YHM-9630-DX) is a carbine-length quad-rail handguard for the AR-15, machined from 6061-T6 aluminum and finished in hardcoat anodized matte black to military specifications or better. An extended top rail gives a gap-free fit against the upper receiver, and T-marked rails make it easy to index accessories in the same position every time. Distinctive diamond-shaped heat vents cut weight while helping dissipate heat during extended strings of fire.

Key Specifications

• Quad-rail design with Picatinny rail on all four sides.
• Diamond-shaped heat vents for weight savings and cooling.
• Extended top rail for a gap-free fit to the upper receiver.
• T-marked rails for consistent accessory indexing.
• 6061-T6 aluminum construction.
• Hardcoat anodized matte black finish to MIL-SPEC.
• Includes jam nut, barrel nut, and anti-rotation screws.
• Carbine-length sizing.
• Overall length of 13.1 inches.

Frequently Asked Questions

What rail configuration does this forearm use? A full quad-rail with Picatinny rail on all four sides.

Is mounting hardware included? Yes, the jam nut, barrel nut, and anti-rotation screws all ship in the box.

What finish does it have? Hardcoat anodized matte black to MIL-SPEC.

Buy the YHM Diamond Series Forearm

A quad-rail still has its place for shooters who mount accessories on multiple sides, and this Diamond Series forearm delivers that with real heat management built in. Yankee Hill Machine includes every piece of hardware needed for install. Browse our full AR handguards selection and order from our Lubbock, Texas gun shop for fast, insured shipping.