If you just interested in getting sights on it, putting a banded front sight on is easy. Ruger sells the front sights for standard, african, alaskan ( and likely RCM) contours and NECG makes them in many sizes.
They install with a set screw and if you desire something permanent you can add...
I just picked up a early M77 MKII. Its one of the ones that still has the push feed bolt. Does anyone know if Ruger will still convert it to CRF? I heard they used to do it years ago but hadn't heard recently.
Normally I would call Ruger but I missed there customer service by a few minutes.