Magic Gun, Pistol (3.5e Equipment)
From D&D Wiki
Magic Guns aren't really magical by themselves; a magic gun gains magical properties once in the hand of a gun mage. If the Magic Gun isn't enchanted it simply doesn't work since it relies on magic to fire its bullets. A Magic Gun fires regular bullets by using magical force. A Magic Gun can channel magical power from the wielder if he is a gun mage. A Magic Gun enchanted by a source other than the gun mage mana power may be used as a exotic weapon. A Magic Gun can fire a number of bullet equaling its Enchantment score before reloading. A Magic Pistol is just a one-handed, weaker version of the Magic Rifle.