These A2 Type Round, Rifle Length Handguards are premium quality parts molded from a fiberglass composite for heat resistance in sustained fire – they will not deform when subjected to high barrel heat. Approx. 12” long, (30.5cm) these fit AR-15 / M16 rifles with 20″ or longer barrels. Raised ribs provide a solid grip for easy carrying and firing. Internal aluminum heat shields protect the shooter from barrel heat transmission. The 2 piece design can be used with either round or triangular handguard caps, and installs easily as both halves are identical and can be installed in either top or bottom position.