Plasma pistols and plasma rifles because you have your full-auto and your manual. Or make on e primary and one a secondary.
Both PP: Use this for speedball arenas. PP has the feel of a speedball gun. The bolts go pretty much as fast as the paintball guns in real life. Carbine: Use this for woods ball. Since woods ball arenas are alot bigger, Carbine scopes and easily fix this. So really both of them have their ups and downs.