Nice!... So is that a 10" barrel and a 6 1/2" HG in the picture?
10" bbl, yep. Exact HG measurements, not incl the locking ring are 6" top, and 4-7/8" bottom.
I'll edit out my remarks about OAL. You know how when you learn something wrong the first time, it takes a while before the right answer sinks in...