The problem with a lot of the suggestions made above is that they aren't stainless. Any more to me non-stainless firearms are toys that stay in the safe. Any serious hunting rifle is stainless. I don't need any more safe queens.
Ouch! If you looked in my safe, you would only find one stainless rifle and that would be a pre-64 Model 70 in 220 Swift. None are left in there and not shot or hunted...