I think them to be a pretty serviceable rifle/shotgun. They are "bare bones" in that they don't have DST, patchbox, etc, but the butt is easier on the shoulder than that evil crescent on so many Hawkens. 1-48" twist, .50 and .54cal, 12ga shotgun...some late models had synthetic stocks vs walnut.
The SS/synthetic version was the Grey Hawk with 24" barrel vs the 26" rifle barrels on the New Englander. The Tree Hawk was camo, 22" with a quick twist barrel. Barrels are mix/match.