Don't even look at them crapy Leupold rifleman scopes. They are total junk. Seen three of them just fall apart.
It all depends on how much you want to spend.
Me I would go with a good mid grade scope from Weaver
. Seeing as the rifles has a nice glossy finish get a glossy scope. How much power do you want. A 4x would work well on this outfit, or a 2-7 or 3-9. Unless your like me and like scopes that are over 10x My lowest power scope is the 4-16x40mm on my Remington 511-x My other rimfire has a $200 Weaver Kt-15 scope on it. Gun = $100. I just got a new to me Mossberg M 46(b) b and it is going to get a nice scope on it as well.
The scopes above are in the $150 to $200 range maybe a little more. If you do not want to spend that much on them try looking into Mueller
. They are low cost but high on performance. I know a bunch of hard core varmint hunters that swear by them.