Fortis REV™ is an extremely lightweight yet robust free floating rail system. When designing the REV™, Fortis didn’t want just another rail system, They wanted a better, lighter, feature rich handguard that was robust and within budget. They’ve managed to reduce as much weight as possible while maintaining strength by utilizing a 1 piece body design. KeyMods were added at the 6 & 9 o'clock positions for modularity and additional weight savings. Its unique mounting system captures a standard AR15 barrel nut for easy installation. Check out all the features and see for yourself why the Fortis REV™ beats the competition. Because of the anti-rotational tabs, the REV™ rail may not fit all uppers without slight modification. Fits most mil-spec forged uppers without any issues.