Yes, I see this as well. My barrel is the next big decision in my first build. The purpose of the gun is to begin shooting at distance but I would like to keep it from being too cumbersome to serve other purposes( i.e. hunting, self proection). I have decided on the 18" part of the decision, and a rifle length gas system, but thats about it. Maker, profile, and CL vs. SS are still up for debate. The 18.5" SS on FA's site is a half lb heavier but $50 cheaper then their CL in the same length. The gun will probably never go full auto and besides the occaisonal mag dump will rarely see too much rapid fire. How much accuracy can I expect to be gained from the medium weight, or the SS aspect, of said barrel? How much difference does a half lb of barrel make in terms of lugging this thing around? Will a nitriding process make the SS barrel as corrosion resistant as the CL(or close to it)?