I have a sample of one Ruger American in 5.56, 16.5" threaded barrel. Action is nice and smooth and the trigger is decent. Magazine and stock are really low grade, and the accuracy has not been all that great. It could be me because the gun is so light but my 16" middy chrome lined BCM is twice as accurate.
I think we had a discussion a while back about the best all around and the consensus was the AR is the best. As someone who owns AR's and bolt guns, I would have to agree.