I'm glad that you got your letter from Cody! The reason that it states octagon barrel with no length, is because its a standard 24 inch long Barrel, and there was no need to indicate the length unless it was something special, whether it be longer or shorter! When measuring the Barrel, go from the end of the threads, in the receiver to the end of the muzzle! Should measure 24 inches. I could be wrong, but as memory serves me, from the end of the Barrel to the center of the front sight dovetail, it should measure 15/16 of an inch!