Got to tell you. I finally got my 300 Black out upper. Took a while, I found a place local that builds them. Told DSA to stuff it up der butt, Waiting since 8-16-12 for them.
I got one from SOTA Arms in North Branch MN. I got a flat top upper with a floating hand guard and a BCG for $389 On sale.
SO far I am in love!!!!! For me I am about supersonic plinking with it. Fitting a nich just past a 30 carbine.
I havent tried any high end components yet.
Just some 125gr pulls re-sized to .308 and some LEE 312-155-2R cast bullets. Pretty dang happy with the results.