John, maybe I did miss the point. At any rate, I clearly stated that non-chrome barrels work just fine, and, in fact, are generally more accurate than chrome. I was confused at your posts, in that you didn't seem to address the longevity issue, but rather alluded a couple of times to the issue of ease of cleaning.
The specs on the RRA limited edition rifle looked pretty impressive to me. I'd guess that adding chrome barrel and chamber and an A-2 configureation would add a little to the price. I'm just more familiar with Bushmaster, and my experience with Bushy has been outstanding.
I had the opportunity to handle a Wilson Combat AR at our local range and was surprised to see that they utilize a RRA lower. I'm sure that RRA quality is superb. Enjoy your rifle. (I certainly have enjoyed mine.)