Abstract: A physical protection device comprises a receiving chamber having an inner tube. At least one bullet is placed in the inner tube. A front end of the inner tube has an opening. A top of the receiving chamber is installed with an emitting key. Each of two lateral sides of the receiving chamber is formed with a slot and a buckle. Two sides of the front end of the base have tenons corresponding to the slots and ears corresponding to the buckles. An interior of the base is installed with a push rod. An impact unit and a stud; a bottom of the push rod has a quick restoring spring. A rotatable handle is pivotally installed to a bottom of the base. One end of the rotatable handle resists against a front end of the impact unit and another end of the rotatable handle is a free end.