I just purchased an excellent combat master, but I'm not certain whether it's
a MK V or a MK VI. The gun appears to be bead blasted overall, a lighter gray than what is normally the finish on the MK V and the sides of the slide are not highly polished as on the MK VI plus it has the adjustable rear sight. The slide says Detonics .45 and right under that script it reads combat master. Which is it a MK V or a MK VI?
The frame is stamped Seattle, WA rather than the usual Bellevue, WA. can someone explain this difference as well.

Thanks guys - John D