US Patent 7108620 Game dart having ballast

A game dart includes a dart barrel having a hollow chamber and front and rear ends each having a screw hole communicating with the hollow chamber. A ballast is retained in the chamber of the dart barrel, and includes two ends each having an engaging member for suspending the ballast in the chamber of the dart barrel, a dart point and a longitudinal flight shaft each includes a threaded coupler for detachably threading with the screw holes of the ends of the dart barrel, and the shaft includes a flight attached to the trailing end. The ballast may be molded within the dart barrel, and the dart barrel may have the screw holes directly formed in the ends for threading with the dart point and the shaft.