Knights Armament Company URX 3/3.1 8-Rib Rail Section Kit, Polymer Picatinny Rail, Fits AR-15, Black 30412-BLK
Knights Armament’s URX 8-Rib Picatinny Rail Section attaches directly to a URX III or 3.1 modular handguard via a hex head screw. It allows the user to install any number of tactical accessories to the forend if desired. Installation hardware included. Constructed of lightweight polymer.