thanks for the reply Nomercy448.
my budget is quite limited, as my only source of financing my hunting project will be part-time jobs, and that's why I want a combo barrel shotgun, so I can hunt many types of game with only one gun.

$1,000?? Boy that's way too much for me, I was hoping max 300$ for my optic :/
Could a prism scope of about 3x or 5x be enough?