A special automatic out the front knife device transformed as a bayonet for rifles, shotguns and pistols. Particularly this knife product is related to rifle, pistol and shotgun applications where having a knife or bayonet readily available is desired. The device is to be used with a weapon such as a rifle, shotgun or pistol and is comprised of an out-the front, encased spring activated blade component and at least one manner or way for connecting the blade component to the weapon wherein the out-the front, encased spring activated blade component which can be removably secured to the rifle, shotgun or pistol for use as a bayonet.