Great red dot for the price - Vortex SPARC Solar 1x31 mm 2 MOA Red Dot Sight

This thing has held up well on a short AR. It is lightweight, durable and has held zero so far after a few hundred rounds. If you are outside a lot with your rifle you will never need a new battery. I always check the barrel end of red dots with night vision to see what signature they give off and this one was very small if any. I do wish there was an option for a flash kill device during the daytime to avoid glare reflection.