Target435 and I spent a couple of hours at the range on Friday. Had fun despite the fact that most of the time it was in quite a downpour (shooting points are covered).
We did a bunch of shooting at 25 and 50 yards; most of what we were interested in was in function testing and sighting in some new weapons. Target435 has the largest collection of pistol caliber ARs I've ever seen belonging to one person, and he didn't even bring them all

It was also the first opportunity I had to shoot the CavArms lower, and I really like the length of the stock, though I think it would work best on a target style setup for me.
Anyway, I had just picked up an EOTech to play with (Model 502; N batteries, no shield. $219) so I mounted it on top of my RRA/Bushy M4A3, and had my OKO on my RRA lightweight carbine.
The OKO had origianlly been sighted in using my basement 50 foot range and a 22 conversion kit, just to get it on paper when I got a chance to get it outdoors. When we had our SE PA shoot a few weeks ago I found that the rifle would break clay birds at 100 yards as it was, shooting offhand, so I didn't touch the sight adjustment.
At 25 yards on Friday, the rifle put 60 rounds into a ragged 1" hole with the sight set as it was. Given the weather conditions, I can't complain; it has a 4 MOA dot so 1" at 25 yards is exactly right. That was shooting in a seated position, not using a rest. The rifle weighs right around 6 pounds, so it's very easy to shoot that way.
I had just received the EOTech the day before, so other than reading the instructions and mounting it on the rifle it was unfired. The Bushy upper had been broken in the previous week. One thing I have to reiterate; the Mini-Y Comp is
really annoying. I had the chance to stand behind Mike as he was hooting it and even standing 6 feet directly behind the shooter you still get buffeted.
The EOTech took some time to get sighted in. At 25 yards it started off about a foot low and a foot to the right. Once I got it sighted in, it was as effective as the OKO at short range, though the OKO still gives me a better feeling for a CQB sight.
The EOTech, with the 1 MOA center dot, has greater potential for longer distances. Unfortunately, the torrential downpour that was happening severely unmotivate us to take a walk out to the longer range target stands. Perhaps I'll get to that next week.
More info when the situation merits it.