well there aint much since the gun is not angle eject, rossi has a scout mount that goes where the rear sight goes. for the scope itself i can't help you much but a scope with a long eye relief would be necessary, like a pistol scope. by the way do not disassemble the gun with out some research its a very complex firearm.Just purchased a rossi m92 24 in octagon barrell and needing some scope mountings and oo tic choices any and all help is appreciated