I have to wait until it gets here for a better pic, these are from the former owner. He cannot tell me if there is rifling present, he is not a gun guy. It may very well be a smooth rifle. The wood repair was there when he was a kid, 70 or so years ago. My best guess is it was a late flint smooth rifle, used, used, and reused until it was not deemed worthy of any more repairs. The lock is a Whitmore & Wolfe, Pittsburgh. It is their earliest type percussion, before they were partnered with other investors. It does not fit correctly by the pics, and I studied alot of pics of original percussion guns over the past few days, mine looks home brewed.