Abstract: An improved safety mechanism for a firearm of either the single or double action type is disclosed in which a slot or hollow is formed in the hammer behind the firing pin. The hollow houses a freely pivotably mounted anvil safety, which in the safe position of the gun is incapable of exerting a force upon the firing pin. An anvil connector bar is upwardly moved under control of the trigger to positively urge the anvil safety to form a firm impact surface against the firing pin, by eliminating the free pivotal movement of the anvil safety.

Abstract: A firearm having interchangeable barrels and ammunition cylinders for changing the caliber of ammunition used therewith includes a plurality of ammunition cylinders and a plurality of barrels, each barrel being threadedly mountable on the firearm frame with each barrel including a longitudinal barrel extension for interfering with the mounting and revolution of the ammunition cylinders for ammunition having a larger caliber than that of the respective barrel, and the improvement therein includes alignment marks on the barrels and frame for alignment under the full threaded engagement of each barrel in the frame, a plurality of sight ribs with each sight rib corresponding to a different barrel, means for attaching each sight rib to its corresponding barrel at a predetermined location to enable each sight rib to its corresponding barrel at a predetermined location to enable each sight rib to be operatively oriented with the rear sight for aiming the firearm when each barrel is fully threadedly engaged in the fr

Abstract: A firearm having interchangeable barrels and ammunition cylinders for changing the caliber of ammunition used therewith includes a plurality of ammunition cylinders and a plurality of barrels, each barrel being threadedly mountable on the firearm frame width each barrel including a longitudinal barrel extension for interfering with the mounting and revolution of the ammunition cylinders for ammunition having a larger caliber than that of the respective barrel, and the improvement therein includes alignment marks on the barrels and frame for alignment under the full threaded engagement of each barrel in the frame and forward sights on each of the barrels for cooperation with a rear sight on the frame to allow aiming of the firearm when the barrel is fully engaged in the frame thereby insuring that the weapon will only be used when a barrel is fully threadedly engaged in the frame and therefore that the longitudinal extension thereof will be operative to interfere with any ammunition cylinders intended for larg