Fig. 12 is a view of the hammer on the side the reverse of that shown in Fig. 11; and E, Fig. 13, is the bolt adapted thereto. _j_ is the pin on the bolt, which holds the receiver by falling into openings on its periphery instead of in its end. The pin _j_ is shown in place in Fig. 11. The bolt E vibrates on a joint-pin at _x_, which is nearly in the same line with the joint-pin _y_ on the trigger, Figs. 11 and 15, by which it is hidden in those figures. _z_ is a cam formed in a recess in the hammer, Fig. 12, which cam is to act upon the bolt E and to disengage it from the receiver. The ends _a′ a^2_ of this bolt are capable of receding from or approaching toward each other, as they constitute two spring-cheeks formed by splitting or forking the bolts, as shown in the drawings. The end _a^2_ lies above the cam _z_ on the hammer when the pistol is not cocked, and the lower end of _a^2_, as well as the upper end of _z_, being flat, the bolt E is lifted in the act of cocking until the pin _j_ is disengaged, and the ends of _a^2_ and _z_ then pass each other. The cam _z_ is made wedge shape by sloping from its upper to its lower end, and the end _a^2_ of the bolt is similarly formed, but in the reverse direction, so that when the piece is discharged the end _a^2_ will be made to spring in, allowing the hammer to pass readily, when the end _a^2_ again rests upon _z_ as before. Fig. 14 shows the hammer with the hand S and ratchet _q_, which need no further description. Fig. 15 shows the trigger and its appendages, which are formed in a way not presenting any claim to novelty. _u_ is the attachment of the mainspring to the lock-plate, and _v_ its attachment to the stirrup and hammer. Fig. 16 shows the apparatus which I employ for forcing the balls into the chambers. _b^2 b^2_ are two of the chambers, shown in section; and C, the arbor by which the barrel is attached to the stock and upon which the receiver turns, as already explained. G is a lever carrying a rammer, H, by which the balls are to be forced into the chambers. The forward end of the lever H passes into the mortise _c^2_, which receives the key by which the barrel is attached. The operation of the rammer H upon the ball _d′_ will be apparent. In using this lever the receiver is to be turned upon the arbor, and the chambers brought in succession under the rammer. This lever, at its end _e′_, constitutes a wrench for screwing and unscrewing the percussion-tubes, and also contains a picker attached to a screw-cap, _f′_. A fulcrum for the lever H may be formed on the barrel or otherwise, instead of using the mortise _c^2_, if preferred.