text: In reply to message70498: Not all red dots run purely off of batteries. I have a Holosun 503CU, it runs battery and solar. The reticle even dims when the light isn’t very much just like the ACOG does when it’s low light. I joined the Army in 2010 and during basic we qualified with iron sights out to 300 meter. My first rifle outside of basic training had a M68 CCO. Personally I don’t see the point of having anything more than a 3x magnification on an AR-15/M4 unless you have a long barrel 18+ inches. Anything less than a 18” barrel doesn’t need anything more than a 3x due to maximum effective ranges. Personally I’ll run a red dot on all of my rifles with a 13.7”-16” barrel with a 3x magnification. Anything less than a 13.7” barrel will have just a red dot. Also remember that a true red dot is a reflexive sight, they are meant to be shot with both eyes open and is the most forgiving with head placement for sight picture.