A crossgun is a mechanized gun, without the aid of explosive propellant, using stored energy in it's place.
You just keep making things up as you go along. The definition of a gun is essentially a metal tube through which a projectile is fired at a high velocity with a flat trajectory.
Also, the length of the archery season is not based on the number of archery hunters . If it were, as the number of archers increased and the number of bucks harvested in archery increased, the length of the season would have been reduced.