And it showed up today at my dealer, got it home and cleaned up. After cleaning the bore I checked it out with the bore cam, the throat is good and concentric, rifling looks good, no bad reamer marks or other bad signs in the bore. I threw one of my Meopta 4.5-14x on it from another upper and got it bore sighted, which took very little adjustment, also a good sign. My Harvester suppressor threaded on without any trouble. The threads are a little loose compared to a lot of my other barrels but I don't think it will be an issue.
I had about 25 rounds loaded with 58 vmax and Varget from my last 243 maybe 7 years ago, and the first round hit my 12" gong at 200 yards. I had some splashes on there that need painted so couldn't really tell at first but got it figured out and fine tuned enough to hit my 4" gong at 200, in a 20 mph wind it looked like about 1.5" group at the biggest, so it's looking like it will shoot without any trouble.
Function was 100%, with a pmag, I don't know which generation it is. First round was single loaded and had lock back so loaded 3 from then on and perfect loading, extraction etc. Ejected rounds bounce off the house wall pretty hard and landed about 2 oclock so definitely plenty of gas with the suppressor, but no marks from the ejectors or extractors. Recoil was virtually non-existent, noticeably lighter than my 243 wssm with 87's. I expect they will be pretty close when I get some 87's loaded up in this one.
Weight wise it is so close to my ar15's with 22" standard profile barrels I don't think you could tell them apart. The buffer spring is noticeably "stiffer" than an ar15. The trigger isn't too bad IMO, about like a RRA 2 stage which it basically copies. The safety is ambidextrous, which is a first for me so we'll see how I like that.
I will check some speeds when I get to wring it out on a decent day, I know 20" isn't optimum for a 243 but it should be respectable.
All in all, I can't believe these aren't/weren't hugely popular. It's so much nicer than the full size 308 AR there's no comparison. For what you get $1200 is a bargain IMO. The only downside to a 243 AR is barrel life IMO, but with cdnn selling replacements cheap that's no longer a concern.