This M-LOK handguard utilizes the existing delta ring and round or triangular front handguard retaining cap. Compatible with most piston-driven and direct impingement gas systems. M-LOK accessories and M-LOK 1913 Picatinny rail sections can be mounted at the two, six, and ten o'clock positions. Includes an integral riveted aluminum heat shield. Front lip and side extensions shield the hand from a hot gas block. A relieved area at the top rear accommodates many overhanging optic mounts. Weighs 8.7 ounces (9.2" length). Reinforced, heat-resistant polymer construction. MADE IN THE U.S.A.