finally got a chance to take out the AR and play with the new optic. overall i give it a thumbs sideways.
first, mounting is easy, just put in on your weaver or picatinny rail and tighten the screws. easy. it mounts good and solid and but its canted a bit clockwise (as viewed from the rear) maybe 2°. no biggy as there are no crosshairs, just a dot.
the dot is plenty bright. there are 11 brightness settings and it was a sunny day and i used number 8 or 9. the dot is supposed to be 2.5 MOA but seemed more like about 4 MOA. it seemed to cover avout 2.5 inches at 50m instead of 100.
light transmission is mediocre. its noticably dimmer looking through the tube that not. the optics are of so-so quality too. the edge of the sight picture through the tube is blurry and distorted.
zeroing is just like any other optic. shoot a group, adjust, shoot a group adjust. i zeroed it for 50m. at 50m i was able to keep a 3 inch group shooting offhand quickly, but not rapid fire. plenty "combat accurate".
the bad news is that paralax error is, as i suspected, terrible. if you don't have th edot exactly centered in the tube, the POI shifts all over the place. you MUST use a very consistent cheeck weld to get it to work right. its definately not the best option for speedy target aquisition and firing. like i said, if you don't hold it to the exact same spot on your cheek each time, POI shifts. the dot must be centered exactly each time making aiming a two step process. center the dot in the tube, then the dot on the target.
i think this would be a good choice for something like your favorite plinking gun like a .22 or a SKS. it would most likely be minute of clay pigeon accurate at 100 with some practice.
i didn't expect the world for $85 and for that price its a good optic for non-serious use. i would not recommend it for a gun that may see defensive use. my AR is really just for fun but of course i could use it in a defensive role should the need arise so i think i'll be saving my pennies for the EOTech 512.
Bobby