A shotgun which allows its operator to fire modified ammunition rounds as either slug rounds or rounds of shot. The shotgun is modified by the addition of components creating an electric circuit in the shotgun. The modified ammunition rounds contain a modified slug round formed by a plurality of shot pellets held together by an epoxy which disbonds upon the application of an electric current. The operator of the shotgun may choose which type of round to fire by operating a selector switch component installed in the shotgun. The shotgun may include a modification to its trigger in which the trigger acts as the switching mechanism to disbond the epoxy binding the shot pellets in the modified slug round.