The ProMag Black Polymer Carbine Handguard Rail was designed specifically for use with AR-15/M16 style weapons. This handguard rail was precision-molded to fit MIL STD 1913 Picatinny-style rail specifications. Made from a proprietary black polymer, this handguard rail was built to last. Not only is the ProMag Black Polymer Carbine Handguard Rail incredibly durable, but it attaches quickly and easily by three machine screws - no permanent modifications to your weapon are required and all of the hardware you need to install the handguard rail is included.