TROY Industries Battle Rail, 10.5 Low-Profile SOCC Rail, Fits AR-15 Rifles, 223REM/556NATO, M-LOK, Aluminum, Flat Dark Earth SRAI-SR1-10FT-00 Troy's SOCC BattleRail M-LOK Handguards are narrow" sleek and provide exceptional balance and controllability. Lightweight with an ultra-low profile" snag-free design" they are ideal for close quarters maneuverability. Machined from hardened aircraft aluminum with stainless steel components and finished in Mil-Spec hardcoat anodizing" they mount to a standard AR-15 barrel nut (not included).