Yankee Hill Machine YHM Diamond Series Handguard

Yankee Hill Machine’s Diamond Series rifle-length handguard is a quad-rail forearm designed for AR-15 platforms. The forearm incorporates diamond-shaped heat vents and an extended top rail intended to produce a gap-free fit. T-marked rail sections simplify repeatable accessory placement and the assembly accepts YHM end caps and anti-rotation hardware. The forearm and barrel nut are specified as 6061-T6 aluminum with hardcoat anodized matte-black finishing; fasteners are steel with a matte-black plating.

Key Specifications

• The forearm is designed for AR-15 rifle-length platforms.
• Construction uses 6061-T6 aluminum for the forearm and barrel nut.
• Surface treatment is hardcoat anodized matte black to military specification or better.
• Features diamond-shaped heat vents for improved cooling and weight reduction.
• The top rail is extended for a gap-free installation with the receiver rail.
• Rail sections are T-marked to indicate accessory mounting locations.
• Includes jamb nut, barrel nut, two anti-rotation screws, and the forearm tube in the assembly.
• Anti-rotation screws and jamb nut are steel with a matte-black finish.
• Provides a Picatinny quad-rail style accessory mounting surface.
• Product type is listed as a Handguard and fits AR-15 platforms.

Built with durable materials and practical features, this Diamond Series forearm is intended to serve as a stable platform for optics, lights, and other accessories while aiding heat management and maintaining a consistent rail interface. Its combination of mil-spec hardcoat, Picatinny rail sections, and anti-rotation hardware makes it suitable for shooters seeking a reliable rifle-length handguard for AR-15 builds.