Magic Gun, Rifle (3.5e Equipment)
From D&D Wiki
Magic Guns aren't really magical by themselves, a magic gun gain magical propriety once in the hand of a gun mage. If the Magic Gun isn't enchanted it simply don't work since it rely on magic to fire it bullets. A Magic Gun fire 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 other source than the gun mage mana power may be used as a exotic weapon. A Magic Gun can fire a number of bullet equalling it Enchantment score before reloading.