If you email McMillan they will send you pics of the grip and even comparison pics vs other stocks also. Judging from the description it seems to have the rear end of an HTG. The HTG has a slight swell but nothing like a HS sendero stock.
Thank you 805. It is very similar to the HTG but with a slightly larger fore arm. My Sendero is a first generation and has no swell, you're right about the second gen's-large swell.