A firearm apparatus to be worn on the user's forearm generally having a firearm body that includes a magazine pack and a power source box that extend on opposite sides of the firearm body for supporting the firearm on the wearer's forearm. The combination of a base surface of the gun body with the magazine pack and the power source box further defines an open sleeve that conforms to the wearer's forearm with first and second fastener material straps for securing the user's forearm for operation of the firearm apparatus. The gun body has an electrical wire that is electrically connected to the firearm's internal triggering assembly and the firearm's external triggering means. The electrical wire includes a first connect and a second connect such that the firearm apparatus is operable by touching the first connect with the second connect in order to complete the electrical circuit.