I'm going out on a limb and saying it's a smooth rifle. The main purpose being versatility. The gun could be loaded with wad and shot for small game, and patched ball for larger game. Despite the lack of rifling, the ball load could be very accurate within 50 yards. I built a 54 cal-28 gauge flintlock smooth rifle just to fill those needs. I've taken several turkeys with my shot load, and my .530 patched ball is pretty accurate.
