That "protective" cap is much more "decorative" than "protective". Mount the reg any way you see fit. It'll work just fine either way.
I have a Zeagle 50D with a swivel cap. I mount mine swivel up. It's my reg and that's the way I like it!
I have a Zeagle 50D with a swivel cap. I mount mine swivel up. It's my reg and that's the way I like it!