Yeah that's the Competition. Same one I have. GREAT gun. Easily my favorite gun (cocker or otherwise) that I've ever shot.
The stock reg is adjustable. You'll see on the bottom section of the reg body that there are wrench flats. Take that part off and you'll see a screw, which is your adjustment screw. They aren't the easiest to adjust, but they are really consistent regs. I've seen mine do +/-4 with pretty lousy paint before.
I'm not sure about the bolt, so I'll leave that to someone else.