My best guess would be that it's a Pakistan/Middle Eastern tourist item. Too many incongruous features combined in one piece.
The engraving on the lock plate (the 'open eye' [Egypt] and vines) is very representative of that area. The additional engraving at the breech, the muzzle and vertically along both sides of the grip, are also very representative of the regional style preferences in flintlock/percussion era pieces.
It does have tight inletting... and the addition of a dark black material at the butt is a nice touch, but a little too much.
Good luck!!