I'm thinking about buying a cheap rifle -- Mossberg ATR -- and installing open sights on the rifle. My use for this rifle is for those days when the weather is wet and I don't want to take out my handsome walnut stocked rifles. I want the rifle to be cheap, and that includes not spending a bunch of money on a scope. Buying a cheap scope, however, seems a recipe for fogged lenses on a rainey day -- the planned use scenario. Can open sights be installed on a rifle by a gun smith without costing an arm and a leg?

I have also thought about picking up a beat-up rifle in a pawn shop or shooting range, old military surplus rifle such as a .303 for example. The right rifle just hasn't materialized yet.