Hey guys, bought my first ar 15 recently and I am looking for a cheaper ($100ish) red dot sight. I know you get what you pay for with optics, but i really just want it for plinking so I do not want to pony up for an eo tech. Any suggestions? I am looking at the Primary arms reflex sight and the bushnell reflex as well as the vortex sparc although it is a tube sight not a reflex. Any help would be appreciated!