Have a 6mm off the 6.8 case.... like that one too... so yeah the 6.8 is ok too. But then its 277 and I dont' like that caliber personally, would take a 6.5 grendel over that...
TWR, yep you can put blades on and drop it etc... as they say. And that is the TRUE beauty of the system, even if I don't see the need for spinners and such, everyone can have their way... once brownells put out an AR only catalog... that opened many eyes to the absolute ton of parts available.. a far cry from the first flat top I ever saw... an A1 vietnam era, no FA, cut off the carry handle and epoxied/screwed a generic weaver base to the top.....
