What I am looking for is an 18 - 20" barreled gun that is multi use and 7- 9 lbs...mb
But it has to be the "best"? That may be very subjective. When I was looking for an AR10 308, I went with the classic Armalite, and yes that is an actual "AR10". The rest are "AR308 patterns". All semantics, however. Can you live with a rifle that is both very accurate and reliable, while not necessarily being the "best"? Whatever that may require... For my 6.5 Creedmoor I went with a S&W performance center. It does well enough. Has a 5R barrel and always shoots sub moa:
Weighs in around 9 pounds. Like I said, "best" is highly subjective. I've been pretty content with mine. It's a solid shooter. I can also say that I have a buddy that built his from an Aero Precision upper and lower and it shoots almost as well, but he has half the money into his.. The next one I can compare it to is a rifle my buddy has. It was given to him as a gift from one of his contract buddies. It's a Savage MSR I believe. That rifle shoots phenomenally well, but it has issues. The other day he was shooting it and the brass got stuck in the chamber 3 different times. He finally gave up on shooting it. I put mine away, as I didn't want to make him feel bad.
That rifle shoots well enough that I decided to throw a NF scope on it. All my other AR's run cheap azzed Burris'..
I've never had a single issue with this rifle, so it is good enough while not being the "best"..