Modular Handguard is designed to improve the accuracy and the handling characteristics of the rifle. The floating studs allow complete flexibility in bipod positioning. Extra studs allow for proper tactical sling set up. Two-piece design allows for easy installation. Ventilated, fluted design is 20% lighter than standard tubes and offers excellent heat dissipation. Posi-grip center assures non-slip grip. This handguard has a 1.75" ID and 2.00" OD. Leaves the gas block exposed on 18", 20" or 24" rifle length barrel systems, covers gas block on 16" CAR barrel systems.