Nice looking build. Is there a reason you mounted your bi-pod backwards? If the legs don't lock into place then you will not be able to properly load your bi-pod without fear of your legs folding on you.
I have two Fulton uppers. The carbine with the 16" Krieger Criterion barrel is nearly as accurate as my varmit rig at 200 yards; I've been thinking about a Krieger barrel for my Rem 700.