The Sliding Revolver Pistol is a new design of revolver pistols which has less recoil and more accuracy. The main difference with traditional revolver pistols is that the new design lets the barrel and cylinder slide back together at firing time.

A firing mechanism for a firearm includes a frame; a barrel attached to the frame and including a conical taper at a rear end of the barrel; a chamber attached to the frame and including a central bore through a center of the chamber and a conically tapered counter bore at a front end closest to the barrel; and a spring in the central bore to force the chamber backward.

A handgun includes a barrel which extends in a longitudinal direction, and a breechblock with a breechblock insert. The breechblock insert can be brought into a first state and into a second state where, in the longitudinal direction of the barrel, the second state has a play which is greater than a play in the first state.

A handgun includes a barrel which extends in a longitudinal direction, and a breechblock with a breechblock insert. The breechblock insert can be brought into a first state and into a second state where, in the longitudinal direction of the barrel, the second state has a play which is greater than a play in the first state.

A firing mechanism for a firearm includes a frame; a barrel attached to the frame and including a conical taper at a rear end of the barrel; a chamber attached to the frame and including a central bore through a center of the chamber and a conically tapered counter bore at a front end closest to the barrel; and a spring in the central bore to force the chamber backward.

An open frame revolver may have an upper frame and lower frame pivotally connected together, an opening located in between the upper frame and the lower frame. A spring assembly may be located in the lower frame and a trigger assembly located in the lower frame, wherein the trigger assembly is connected to the spring assembly. A tension axle located in the lower frame, wherein the tension axle on one end connected to the trigger assembly and spring assembly and on the other end has a lock. A hammer axle may be located inside a drum, wherein the drum could be pivotally supported by hammer axel and hammer axle may have a lock on one end. A hammer may be located outside of the upper frame connected to the hammer axle, a safety lock located in the lower frame, while a frame lock located on the lower frame.

An open frame revolver may have an upper frame and lower frame pivotally connected together, an opening located in between the upper frame and the lower frame. A spring assembly may be located in the lower frame and a trigger assembly located in the lower frame, wherein the trigger assembly is connected to the spring assembly. A tension axle located in the lower frame, wherein the tension axle on one end connected to the trigger assembly and spring assembly and on the other end has a lock. A hammer axle may be located inside a drum, wherein the drum could be pivotally supported by hammer axel and hammer axle may have a lock on one end. A hammer may be located outside of the upper frame connected to the hammer axle, a safety lock located in the lower frame, while a frame lock located on the lower frame.

A method of firing a firearm includes rotating a trigger to force a latch pin lever to move; forcing a latch pin forward by the latch pin lever to force a cylinder forward toward a barrel; sealing or substantially sealing the barrel and the cylinder; and releasing a hammer to strike a cartridge while the barrel and the cylinder are sealed.

A specialized underwater pistol with ammunition includes one or more of barrel expansions to shape the pattern of the plural shot pieces expelled from a pistol cartridge when the pistol is fired, an aerodynamic trigger cam or spur, flushing ports, a wide trigger pull, a wide hammer spur, a cartridge shot carrier with a frangible end, and cartridge sealant.

A specialized underwater pistol with ammunition includes one or more of barrel expansions to shape the pattern of the plural shot pieces expelled from a pistol cartridge when the pistol is fired, an aerodynamic trigger cam or spur, flushing ports, a wide trigger pull, a wide hammer spur, a cartridge shot carrier with a frangible end, and cartridge sealant.