I guess the best way I can explain it, if you haven't had the chance to put your hands on it, is a tactical comb on the back end, with a nice vertical "tactical" style grip. Then on the fore-end of the stock, it is much thinner, more like your average "hunting" style stalk. For instance, my Sendero, and some of the other long range stocks in general, have a pretty wide fore-end for the bipod to sit on. The Greybull is pretty narrow. The guy I was shooting with didn't have a bipod on his so I don't know how the fit is there.
On a side note, I believe there was a split at Greybull Precision and now I think one of them has a company called "Wyoming Arms." I heard something about there was a no compete clause on the split for "bolt" guns, so Wyoming Arms is all AR-15 type stuff. Therefore, I have no idea what the quality is like at Greybull Precision anymore. They did have a good reputation.
And yes, they are made by Bell and Carlson as far as I last knew.