I checked out the Ruger at the shop the other day - didn't even know it was out, but overheard the shop owner on the phone telling someone looking for one that he had 'em in stock.
Walked back over to the rack and played with it a bit, then came home and did a little research (still researching / verifying):
1. It's made in their new plant, just up the road from me in Mayodan, NC (two employees from the plant happened to be in the store at the time).
2. While the barrel nut is proprietary, it was reported that a regular barrel wrench would fit it, and you could easily replace it with a conventional barrel nut if you so desire.
3. I think one report I read said the BCG was shot-peened and / or particle inspected (if that's important to ya), and the gas carrier keys are staked.
4. It has M4 feed ramps.
5. I did notice that instead of a bayonet lug, they have a QD mount.
6. Tom Gresham had a Ruger rep on this week's podcast - he was telling how many parts they were producing in-house for the gun, instead of buying from suppliers (if that's important to ya).
You can stream / download this week's Part A with guest Mark Gurney of Ruger @
http://guntalk.libsyn.com/
I don't really need another AR, but I gotta admit, once the newness wears off and the price comes down from the shop's current $599, I wouldn't be surprised if one didn't follow me home.
Of course, after reading much of this thread, I realize it would be sacrilege to store it next to my Colts!