so, i love this rail, but im changing gears on my builds, and need the cash. it is a FAB Defence VFR. carbine length, free float, piggy back rail. comes with three detachable rails, that can be mounted in seven different spots. it mounts using the existing barrel nut and delta ring in place. made in Israel. asking $250. would also consider trades for a rifle length ff rail, with cash going one way or the other, depending on the rail. or the right 20" heavy AR barrel. list price on mako defense's site is $392.15.