Diamond-shaped vents in a unique, latticework pattern give your weapon a distinctive look and provide superb airflow to prevent barrel from overheating. Helps keep your hand cool, too, while reducing weapon's overall weight. Provides four, full-length Picatinny rails for maximum flexibility in mounting tactical accessories. Four, full-length Picatinny rails provide maximum flexibility in mounting tactical accessories. Machined from high-grade 6061 T6 aluminum and mil-spec hardcoat anodized to withstand combat and heavy-duty usage. Extended top rail gives a gap-free fit to receiver rail. Slots are marked alphanumerically to help identify accessory locations. Threaded front end accepts Yankee Hill screw-in end cap, available separately. Comes with jam nut, barrel nut and anti-rotation screws to ensure handguard stays locked in place.

SPECS: 6061 T6 aluminum, mil-spec hardcoat anodized, matte black. Carbine – 7ј" (23.5cm) OAL, 2Ѕ" (6.4cm) dia. 12.5 oz. (354g) weight. Fits AR-15/M16 with carbine-length gas system. Mid-Length – 9ј" (23.5cm) OAL, 2Ѕ" dia. 15.2 oz. (431g) wt. Fits AR-15/M16 with mid-length gas system. Rifle – 12Ѕ" (31.8cm) OAL, 2Ѕ" dia. 16.6 oz. (471g) wt. Fits AR-15/M16 with rifle-length gas system.