Sam,
You got me on the 6.5 Hansel. Maybe I can convince the Mrs. that she can keep the Grendel and I need a new Hansel.
The barrel is 24" long, the only length Alexander Arms provides in the Overwatch. It is longer than necessary for hunting, but on my property, 90% of the hunting is done along meadows and hay fields so I'm not too worried about tramping through the woods with a long barrel. If it becomes an issue, I'll find a gunsmith and have it shortened to 20" or so. I'm still not good enough with my Ace Hardware hacksaw.
I have a couple boxes of Hornady factory ammo (as I mentioned in my review) which also deliver sub-MOA groups. I am hoping to drop my group size by 25% or more once I get a better trigger installed....the mil-spec trigger leaves a little bit to be desired.