Yankee Hill Machine Diamond Series 9.2" Mid-Length AR-15 Forearm

Yankee Hill Machine Diamond Series Forearm

The Diamond Series forearm represents a thoughtful approach to AR-15 furniture design. Built from 6061-T6 aluminum and hardcoat anodized to military specifications, this mid-length forearm delivers durability without unnecessary weight.

Key Features

• Diamond-shaped heat vents for improved ergonomics and thermal management
• Extended top rail ensures gap-free installation with your upper receiver
• T-marked rail system helps you index accessory locations consistently
• 9.3" overall length provides balanced control for mid-length gas systems
• Military-spec hardcoat anodize in matte black resists wear and corrosion

What's Included

The forearm comes complete with everything needed for installation:

• Forearm tube (aluminum, hardcoat anodized)
• Barrel nut (aluminum)
• Jam nut (steel, matte black plated)
• Two anti-rotation screws (steel, matte black plated)

Installation

The anti-rotation screws provide secure, repeatable mounting. The extended top rail eliminates the gap commonly found between forearm and upper receiver, creating a cleaner appearance and more rigid platform for optics and accessories.

Whether you're building a practical rifle or refining an existing platform, the Diamond Series forearm offers solid engineering at a reasonable price point.