I purchased a 12″ Fortis REV Free Float Rail for use on my lightweight project build and it has served me well. I needed an extremely lightweight, extended rail that mounted on the standard barrel nut for a 14.5″ barrel with permanently attached muzzle device and the REV fit hte bill perfectly. Fortis has now released the REV II that is basically the same rail except the short the 3, 6 & 9 o’clock forward rails that are present on the REV have been removed on the REV II. They have been replaced with additional KeyMod real estate and QD sling swivel sockets. The result is a rail that weighs even less at just 7.8 ounces (the REV 12 weighs in at 9.2 ounces).
This looks like an excellent revision to the REV series of rails. I really don’t use the forward rails and actually find them to be a bit uncomfortable for how I hold the carbine due to some sharp edges. The new version removes the rails, saves weight, and costs less (at the introductory price). That is a win-win-win.