I recently built a mid-length carbine from all RRA components, some of which I bought at Coal Creek Armory, and some of which I mail ordered, both RRA direct, and through Pete at Legal Transfers. (Yes, I could have just bought a complete rifle, but I wanted to put one together, and RRA had all the features I wanted.) I knew there were lighter barrels available, but I opted for the 16" stainless heavy "match" barrel, because I wanted to try the 1x8" twist, and the .223 Wylde chamber, and I knew the extra weight wouldn't bother me much, especially with the A2 buttstock I'd be using (the first decision I made for the build). I also opted for the RRA Dominator Eotech Mount, which is an Eotech-specific riser with an integrated A2 rear sight. The only non-RRA parts on it are a YHM Phantom flash suppressor, and a Magpul MIAD pistol grip. All the parts are very nice, as AR parts go, and, though it annoyed me to wait 9 weeks for the stainless barrel, I'm very pleased with the assembled rifle. I haven't had a chance to fire it yet, but I like the quality of parts, and the configuration of the build so much (heavy barrel included), that I went ahead and disassembled it, sand blasted the stainless barrel, and coated nearly every part with a thermally cured ceramic finish - major components in matte black, and small parts in matte gray. Thus, a very nice rifle now looks even nicer. I can't wait to get it to a range.