Bison 6.8 uppers

[bch1988]

Has anyone bought and used an upper in 6.8 from bison armory? I'm considering everything for my first ar build, and I'm fairly interested in the 6.8 caliber. After checking out some other forums, people seem to be recommending bison armory for barels and uppers.

Does anyone have some first hand experience with this company and their products?

Thanks
-ben