I am building a AR-15 pistol with a 10.5" barrel in 5.56x45. I narrowed down my search to 4 red dots and are listed below.
The pistol will be used mainly as a ranch rifle and defense. The red dot I am leaning towards is the Holosun 503c. It gets great reviews and is half the price of the others. Also which cowitness, 1/3 or full?
--- Holosun 503c
--- Eotech EXPS 2
--- Aimpoint Pro Patrol Rifle
--- Trijicon MRO