Im German, sorry for the bad English.

Weapon: Marker
Ammo: up to 20 Paintballs
Reload capacity: 5 Paintballs
Reload time: 1sec. per Paintball (holding trigger)
Damage: 2 per Paintball
Shootingspeed: 2 Balls per Second
Range: max the half of the shotgun, maybe like the bow.
Special: Every Paintball leaves a color

I thing it would be fun to have something easier to use than the shotgun so i got this Idea. You could mad ea new gamemode with it. Every hit means one Point, the winner is who made the most hits. Ofcourse things like Damage etc can be changed a bit.