True, but practically speaking it's pretty much impossible to get a legal one which is why I mad the observation about the replica carronades. In the battle of Trafalgar the first shot that the Victory fired was from a carronade that killed a number of French sailors and marines. Nelson's carronades were 3 ton monsters that fired an entire barrel of musket balls as well as round shot at the same time, but a scaled down version is still effective.
Is my Bangalore Torpedo legal? Oh! Wait! I lost that in the “boating accident!”