I just got my new CFS flyer last night, and they are now offering 6.5 Grendel uppers in 4 different configurations as well as magazines. They have not come in yet but they are accepting back orders. I put myself down for an A3 20 inch with 4 mags. The rifling twist rate on these is 1 in 9. From a ballistics point of veiw, this is the most interesting calibers that have been developed for this rifle in a long time. The price is $529.99 I think. I will double check and post a link if I can remeber how.
Here is the link: Centerfire Systems - AR Parts & Accessories