Weapons.
Weapons. Any firearms or any other loaded or unloaded pistol, rifle, shotgun, or other weapon which is designed to, or may be readily converted to expel a projectile by ignition of a propellant, by compressed gas, or which is spring-powered. Any bow and arrow, crossbow, blowgun, spear gun, hand-thrown spear, sling-shot, irritant gas device, explosive device, or any other implement designed to discharge missiles; or a weapon, device, instrument, material, or substance, animate or inanimate, that is used for or is readily capable of, causing death or serious bodily injury, including any weapon the possession of which is prohibited under the laws of the State in which the Agency installation or portion thereof is located; except that such term does not include a closing pocket knife with a blade of less than 2 1/2 inches in length or 2 ounces or less of irritant gas.