Fortis Manufacturing REV II Free Float Rail System 15.3in MLOK Black. Fortis Manufacturing built these AR Handguards & Forends with a one-piece body design to reduce weight while also maintaining strength. Fortis Manufacturing REV II Free Float Rail Systems also feature MLOK at the 3 6 and 9 o'clock positions for modularity and weight savings and their unique mounting system captures a standard AR15 barrel nut for easy installation. Install this Fortis Manufacturing REV II Free Float Rail System w/ MLOK at the 3 6 & 9 o'clock for a versatile handguard that works within a variety of shooting situations and environments. Specifications for Fortis Manufacturing REV II Free Float Rail System: Manufacturer: Fortis Manufacturing Finish: Mil Spec Type III Hard Coat Anodized Fabric/Material: Aircraft Grade 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Type: Free-Float Gun Rail: M-LOK Condition: New Inner Diameter: 1.34 in Mount Type: M-LOK Quantity: 1 Features of Fortis Manufacturing REV II Free Float Rail System Continuous Top Rail Rotation Limited QD Sockets MLOK at the 3 6 and 9 oclock Anti-Rotation Tabs Uses Standard AR15 Barrel Nut (Not Included) Package Contents: Fortis Manufacturing REV II Free Float Rail System Fortis Manufacturing REV-II-15-ML: REV II Free Float Rail System 15.3in MLOK Black