Military round comparisons

[stanc]

...I guess the infidel 6.5 Grendel will NOT have the distinction, as it's older brother does, of having been a cartridge rejected by the US Army and USMC and adopted by the land of jihadis and 911 perpetrators.

I suppose not. But, I gotta say, that UCIW is a pretty cool looking little package.



Somebody refresh my memory, please. Is 6.5 Grendel usable with an 8.5-inch barrel AR? Are the internal ballistics -- pressure curve, gas volume, or whatever -- compatible, or is 10.5 inches the shortest length that will work?