Bryan, it sure is. This has a 15inch RPR Free Float M-LOK Hand Guard. Hope this helps.

The Radical Firearms RPR (Radical Parallelogram Rail) System is ultralight and slim for the shooter who wants every ounce of weight savings in their build but still want to attach accessories via M-LOK slots. Our free float design offers the ultimate control for tactical, competition or sporting applications.

Hi Bryan and welcome. Yes Sir, this model has a 15" RPR free floated M-Lok Thin Rail system for increased accuracy, keeping your hands cool, and giving you plenty of room for accessories. Cheers and stay safe!

Bryan, yes sir, this has a 15" RPR Free Float M-LOK Hand Guard.
Stay safe & have a great day!