I note that Lagopus correctly identified his as having an "Octagonal" bbl. I can't recall that I have ever seen any gun with a "HEX" bbl. Well that is unless you count the "Bore" of a Whitworth, but I am speaking of the outside. A "Hex" bbl would look sorta odd no matter whether you turned the points to top & bottom or side to side.
For the record Hexagonal is 6 sided & Octagonal is 8 sided.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra