Yeah, I hate the darned things too. There is no reason to use the open sights if you have a functional scope mounted, and no reason to leave a non-functional scope mounted to a rifle. Better to carry an allen wrench with your gear to remove the scope if needed, or invest in a quick-detach scope mounting system.

My suggestion for a compromise if you don't really want to mount a scope would be to mount an aperature (peep) sight on the receiver. One with click adjustments is the best if you want to be able to easily change settings, but the ones that lock in place with a screw are simpler and somewhat tougher. Make sure you get one with multiple sized aperatures so you can taylor the aperature opening to the conditions.

Both Lyman and Williams make good aperature sights that will mount right up to your receiver. If I'm not mistaken, the 336's are pre-drilled and tapped for a receiver sight.

Mike