My gun has a rail that the scope mounts to that allows me to sloide on and off the scope without disturbing my zero and is also an over under type deal.Its hard to explain but on guam often the deer will pop up in close range making it difficult to find them in a high powered scope which I have.So I mostly rely on my open sights and practice them as much as possible.

something like this.Mine is a Saiga .308 semi.