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A more cost effective route might be using aluminum foil and a rubber band to block out light.

Also wanted to add that getting a decent set of irons installed on a rifle that isn't cut for iron sights would probably exceed the cost of a budget scope. Say $40-75 for the set of sights and another $100 or so to install. If you go that route I suggest a quality Smith that does rifle sight installs on a regular basis. YMMV.

At the $200 price point you will be hard pressed to find a quality optic with illumination, BDC, and magnification. I would look at the Nikon Prostaff line with BDC. This Nikon 3-9 is sub. $200, has BDC and the Prostaffs have nice clarity and decent light gathering capabilities but no illuminaton.