SLR 11.7 inch SOLO Mid M-LOK 5.56 Handguard Black SOLO11.7ML-MID. 3 inch Inner Diameter. Mil-Spec hardcoat anodize. 7075 barrel nut w/hardcoat anodize. Free floating design. 4 QD swivel sockets. MLOK at 3 6 and 9 o'clock. Dual wedge mounting system....