I looked at the production gun list, and you're right it's not listed--neither is the Q4 Tac. The only thing that's different with the Navy model that's readily visible is the threaded barrel, right? I guess that if you're concerned with that you could always get a 4 inch barrel to use during the match? Fundamentally, I don't see the difference but I'm also not judging any USPSA matches!
The Q5SF is Carry Optics only though I couldn't begin to explain why that is.
The Q5SF is Carry Optics only though I couldn't begin to explain why that is.