Nope. Punt was the name of a skiff type, low-profile boat. From my reading, the punt gun was the market hunters' tool of choice and could be described as a cannon for waterfowl.
Here's Guru.net's definition:
Duck hunting was a way that early inhabitants of the Chesapeake Bay provided food for their families, and a commercial activity to provide food for restaurants in nearby cities. Very few people actually hunted as a "sport". Techniques were very different than they are today. Large punt guns were very popular for harvesting large numbers of diving ducks, especially canvasbacks, at night. Sinkboxes, blinds below the water surface, were very popular among the recreational hunters. Laws have changed drastically since these early days of excessive waterfowl harvests. Population numbers in the Chesapeake Bay have changed and the government, in attempt to protect the ducks, made bag limits lower so that less ducks could legally be harvested. Duck hunting certainly has changed.
Techniques in the past help us understand how to succeed in duck hunting in the present because we usually learn from our mistakes. In the past, we used large punt guns in the commercial industry. Punt guns were very large and were mounted on the bow of the punt boat. The boats were small and were powered by a small paddle in the back. The hunter laid down in the boat and got behind the large light on the bow. As night fell, the punt boats would glide in to rafts of thousands of diving ducks, (canvasbacks, redheads, bluebills, etc.) The ducks, blinded by the light, would slowly swim towards it. Then, when the punt gun was pointed towards the raft and the ducks were close enough, the gun was fired and hundreds of ducks were slaughtered. This drastically cut down on the population on diving ducks, especially canvasbacks.
Market hunting 'bout wiped out the migrations. Stopped in ... er 1908-18 ish? with the institution of the federal migratory bird act.