Seems to me that Rock River Arms is kind of known as a high quality, high accuracy AR15 manufacturer.  

What's the full scoop on this company and their product?  Are they any better/worse/different than Bushmaster or Armalite and the like?

ESP,

I recently toured their facility, and found them to make an excellent AR15 rifle.  They go the extra mile to make sure the uppers and lowers have a nice tight fit, the receivers are polished before the final finish is applied, and that attention is paid to details in fit and finish when completing the rifles.  They also have some real cool features such as the Tactical Carry handle with a built in extra battery compartment for Aimpoints, etc.  They are also waiting for ATF approval on a new recoil compensator that is awesome looking.  I am carrying the Rock River uppers, parts, and accessory's, and also ordered myself a new National Match A2 rifle.  Oh, and all Rock River rifles come with a national match 2 stage trigger from the factory.

Donnie Pridemore
SABLE CO.
www.sableco.com