My Holosun 507C arrived last week. My first impression is it looks really well made. Machined from a solid piece of Aluminum stock. New version has the battery compartment on the side. Easily accessed and should be completely waterproof. I really like the dot and especially the Ring with the dot in the center. I mounted it to my Benelli M1 90 and hit range. Each click is 1 MOA a 100 yards making in 1/2 MOA at 50 yards. Was able to sightt the shotgun in after 5 shots. Actually shot more moving the inpact left then back to the right. Same amount of clicks got it where I wanted it. It paired up well with the Meadowcreek rib mont. Now to wait till our owner on 19April.
By the way I have an astigmatism and the dot is clearer than other reflex sights I have looked thru.