TROY Industries Battle Rail, Rail, Fits AR-15 Rifles, 5.56, 13, M-LOK, Aluminum, Black SRAI-ML1-13BT-00 Troy Industries is proud to offer their M-LOK BattleRail in response to customer demand. Machined from hardened aircraft aluminum with stainless steel components and finished in MIL-SPEC hardcoat anodizing" these M-LOK handguards are lightweight and sleek. Easy to install" the M-LOK BattleRail attaches to a standard AR-15/M16 barrel nut (not included).