looks like a 4 inch flashlight. Can fire a .380 round. The gun is loaded by unscrewing the front lens area and inserting a single round. When the back end of the flashlight is screwed closed the firing pin, which runs the length of the less than 2-inch-long shaft, is held in place putting the gun on *safety.* When the back end is unscrewed, the firing pin is freed rendering the gun fire-ready. The pin automatically releases itself when it's pulled back, discharging the round.