（1） 用激光笔改装激光枪，激光枪可受电路控制发射激光束，激光束照射于胸环靶上弹着点的光斑直径＜5mm；激光枪与胸环靶间距离为3m。-(1) modified by a laser gun laser pointer, the laser gun can be controlled by the circuit emits a laser beam, a laser beam is irradiated on the point of impact on the chest of the tar