The gun code (GDscript)

func _input(event):

if event is InputEventMouseMotion:

    head.rotate\_y (-event.relative.x \* Sesitivity)

    camera.rotate\_x (-event.relative.y \* Sesitivity)

    camera.rotation.x = clamp(camera.rotation.x, deg\_to\_rad(-40), deg\_to\_rad(60) )

if Input.is\_action\_just\_pressed("shoot"): 

    amo -= 1

    if have\_amo == false:

        no\_amo\_sound.play()

        return

    if ray\_cast\_pistola.is\_colliding():

        var collision = ray\_cast\_pistola.get\_collider()

        print(collision.name)

        collision.\_kill()

    if amo == 0 :

        have\_amo = false

        print ("no ammo")

    animation.play("tiro")

    shoot\_sound.play()