Sorry bad pics but its from an older gentleman. Can anyone possibly identify this regardless of bad pictures? Would mean a lot to him to know what it is.
It was once a Model 1842 Springfield. Without seeing the whole thing but looking at the stock it looks like it's been cut down to be used as a sporting shotgun.
I'm thinking a cutdown 1842. The 1841 would have sights, but even if they were removed, you'd still see the dovetails cut into the barrel for the rear sight. Better pics would help, including the lockplate.