Yeah it is the 18" bull barrel, heavy son of a gun but I like it. Don't like the smooth side upper so I am changing it out to one of the new low profile uppers and then ditching the stock hand guard as well. Torn between the troy as mentioned above and now I have started looking at the JP modular hand guards look to be a bit better put together. Keep reading bad things about troy hand guards not locking down and slipping.
JW