Primary Weapons are your main weapons for getting kills. Primary weapons specialize in various tactics and greatly influence what strategies a player will employ. Secdondary weapons and grenades can be used to increase the effeciveness of your strategies along with cover some of your weak points. For example you could use a sniper to kill enemies from a distance but if an enemy gets up close you could use a shotgun to take them out. You could also use smoke greneades to block the view of snipers so you can get close and gun them down with Submachine guns.