Vortex Strike Eagle 1-8x24:
Vortex Strike Eagle 1-8x24mm Riflescope, 30mm Tube SE-1824-1 Up To 21% OFF New Product
In that link they have a bundle with a cantilever mount for $499.
This is a great scope. It fits your desired use, it fits your budget, it's amazingly tough and no one has a better warranty. Best yet, you won't need to use that warranty.
Lasor1, are you a veteran?