The Yankee Hill Midlength Diamond Forearm is a unique forearm that features diamond shaped heat vents, an extended top rail for gap-free installation and "T" marked rails to mark accessory locations. It will accept end caps, and utilize anti-rotation screws for secure installation. The forearm and barrel nuts are made of 6061-T6 aluminum and hardcoated to military specifications for extra durability. The jam nut and anti-rotation screws are steel and plated a matte black finish to match. Assemblies include: one jam nut, one barrel nut, two anti-rotation screws, and one forearm tube. Overall Length 9.2 Inches. Weight 15.2 oz.