Abstract: An elongated tubular body is provided and which may include circumferentially spaced, generally radially outwardly projecting and forwardly tapering blades. The body includes a rear end including structure for mounting the rear end of the body on the forward end of an arrow shaft and the forward end of the body defines a counterbore in which a rearwardly facing rim fire cartridge may be chambered. The body includes lateral ports formed therein rearward of the cartridge and the forward end of the body removably mounts a tubular plug for maintaining the cartridge seated in the counterbore and supporting a longitudinally reciprocal firing pin including a diametrically enlarged head portion forward of the plug and a rear primer area impacting portion for contact with the rim primer area of the cartridge upon sharp rearward displacement of the firing pin relative to the plug.