The 6.5 Creedmoor is too large for the AR15 platform. It would require an AR10 platform.
yes indeed it would.
Yep. The Remington 6.8x43 was the cartridge that DOD was flirting with a few years ago, apparently the U.S. Army Marksmanship Unit and Special Ops Command had some input during its development. I wonder why it has been nudged out of the spotlight? It seems like a good compromise between the 5.56 and the 6.5 Creedmore.