I am looking for a window type dot/hologram for my new AR. I don't like tube style. I was dead set on an Eotech 512 because it is suposed to be pretty rugged, and I like that it takes a common battery. But they look very large compared to alot of the other sight. I started looking at the Burris Fastfire 3, which looks nice, but maybe too small? Same with the Leupold Deltapoint. The C-more, and the Trijicon might work also. I'd like some input from people with any of these as a primary sight on an AR.