Submachine Guns are cheap and easy-to-find weapons for the Ranger that prefers the spray-and-pray approach for combat. SMGs fire multiple rounds per shot, have very cheap ammo, and bonus accuracy at close range.
However, they have low Critical Hit Chances, low Armor Penetration and are only effective up to medium range.
SMGs fire multiple rounds per trigger pull and are cheap to operate. Take this skill if you like spending clips and cutting your enemies in half.