You could even go with a 1-4X scope. Some have red dots built in if you need it. I have a 1-4X24 scope with red dot on my AR. You will still have the scope if the battery fails.
"I would not be an old man if I had not been an armed young man." JTJ
Patron Member NRA
"If you have always believed that everyone should play by the same rules and be judged by the same standards, that would have gotten you labeled as a radical 60 years ago, a liberal 30 years ago and a racist today"