This is a 3.0. They came out with the 4.0 about a week after I bought this one. Still a little bitter about it. Planning on heading to the range this weekend at some point. I had my 270 wsm threaded as well. Now, to find the caps for the exposed threads.
I know the feeling, same thing happened to me. I got mine early July and have about a hundred rounds through it. The full titanium version heats up faster than my 2.0 but it also cools faster. They recommend cleaning it every 50-100 rounds, which seems like a lot considering I have over a thousand rounds through my 2.0 and have yet to clean it.