All right, I had to cheat and Googled it.
It’s a Russian APS underwater assault rifle.
What’s reverse image search?
Is it a bisely revolver?
Looks like doc holidays gun.
Not a Bisely
Not Doc Holidays gun but the same time frame.
Is it chambered in Russian or Schofield?
Do we need exact variant or does Model alone count? Why I asked regard chambering.
The exact variant if you know it. It is chambered in Schofield.
Smith & Wesson Model 3, No 2 Schofield (frame mounted release)
Is it European?
Yes, it is
Is it a M1879 Reichsrevolver?
is it Belgian?
1Fatman has it, it is the 1879, having the 7" barrel. The 1883 had a 5" barrel.
OK, this should be easy to tell what it is but it is a multi point one. First is what is it, second what brand of scope is it and last who made it famous ( well semi famous).
Winchester Model 70 in 30-06, USMC Unertl 8x, Gnr Sgt Carlos Hathcock.
Spot on with all.