Abstract: A hammer spur construction that is adapted to enable cocking of the hammer without interference of the cocking thumb with a scope mounted on the firearm. The spur top surface, in its uncocked position is disposed so that a plane or line tangent to the midpoint along the length of the spur top surface is substantially normal to the hammer striking surface.

Abstract: A novel indexing system for revolvers is disclosed in which a trigger-actuated finger grabs one of a plurality of circumferentially-spaced notches on the rim of the chambered cylinder and rotates the cylinder through the required arc, as the trigger is being pulled, to advance the next chamber to its proper firing position.The finger is part of a modular unit which fits into a complementary recess of the revolver's frame and takes the place of the standard "hand-and-ratchet" combination for rotating the cylinder. The module forms part of the recoil face and includes a stop for precisely registering the rotated chamber with the revolver's barrel just prior to firing.

Abstract: An improved cylinder and barrel configuration permits a reduction in the stress imposed on the throat of a revolver barrel thereby improving the strength and accuracy of the combination. The design employs some degree of sizing of the bullet directly in the cylinder thus permitting the barrel bore to be smaller and decreasing the jump distance from cylinder to barrel. The bullet sizing occurs at a lower velocity and over a greater distance thus providing better accuracy and permitting increased barrel stength.