Depending on what scope you choose, sometimes a Burris P.E.P.R mount will move the scope far enough forward that you can have the rear sight also. Look for a scope with a lot of eye relief.
My opinion, if you are going to use the rifle for home defense and range shooting out to 100-150 yds (with good eyesight), a red dot or multi reticle red dot sight can be utilized. Anything further, or poor eyesight, I'd go with a scope or use a magnifier with the red dots.
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