validWeapons = {[30] = true, [31] = true}
playerWeapon = {}

addEventHandler("onPlayerWeaponSwitch", root,
    function(prev, cur)
        if (validWeapons[cur]) then
            destroyWeapon(source)

            playerWeapon[source] = createObject(ID_do_objeto, unpack{getElementPosition(source)})
            setElementDimension(playerWeapon[source], getElementDimension(source))
            setElementInterior(playerWeapon[source], getElementInterior(source))
            exports["bone_attach"]:attachElementToBone(playerWeapon[source], source, 12, 0, 0, 0, 180, 90, 180)
        else
            destroyWeapon(source)
        end
    end
)

function destroyWeapon(player)
    if (isElement(playerWeapon[player])) then
        exports["bone_attach"]:detachElementFromBone(playerWeapon[player])
        destroyElement(playerWeapon[player])
        playerWeapon[player] = nil
    end
end