Revolvers have a frame, a cylinder rotatably mounted to the frame and defining a plurality of passages, each passage having a chamber configured to receive a cartridge, each passage defining a bore forward of the chamber and configured to closely receive a bullet and retain propellant pressure to expel the bullet, and each bore having a forward aperture. A firing facility may be connected to the frame rearward of the cylinder and registered with a selected one of the passages, the revolver being free of elements forward of the selected one of the passages. The frame may include a ring defining an aperture configured to receive a first finger. The ring may be free of a trigger. A finger rest may be outside of the ring and configured to engage a second finger. The finger rest may be an elongated arcuate extension having a free end away from the frame.

A revolver-type firearm has a barrel-cylinder gap created between its barrel and a rotatable cartridge cylinder. The cartridge cylinder has a plurality of cartridge chambers each with corresponding counterbore retaining a translatable shuttle. When a cartridge is fired, the shuttle expands and translates forward toward the breech-end of the barrel and seals the barrel-cylinder gap to prevent the escape of gases, flames, and residue through the barrel-cylinder gap. When pressure drops as the cartridge projectile exits the barrel, the shuttle contracts. The barrel-cylinder gap opens upon rotation of the cartridge cylinder as the shuttle translates away from the breech-end of the barrel. The shuttle has a thin cylindrical body, a beveled front end, and a conical central bore and is manufactured from a hard elastic metal or metal alloy such as one comprising titanium.

A revolver-type firearm has a barrel-cylinder gap created between its barrel and a rotatable cartridge cylinder. The cartridge cylinder has a plurality of cartridge chambers each with corresponding counterbore retaining a translatable shuttle. When a cartridge is fired, the shuttle expands and translates forward toward the breech-end of the barrel and seals the barrel-cylinder gap to prevent the escape of gases, flames, and residue through the barrel-cylinder gap. When pressure drops as the cartridge projectile exits the barrel, the shuttle contracts. The barrel-cylinder gap opens upon rotation of the cartridge cylinder as the shuttle translates away from the breech-end of the barrel. The shuttle has a thin cylindrical body, a beveled front end, and a conical central bore and is manufactured from a hard elastic metal or metal alloy such as one comprising titanium.

A double-barreled revolver has a frame, a trigger lever having a first end connected to the frame and movable between a forward rest position and a rearward actuated position, the trigger lever having a free end extending away from the frame and opposite the first end, a guard element forward of the trigger lever and having an upper end connected to the frame and a downwardly depending lower end, and the free end of the trigger lever being separated from the lower end of the guard element by a limited gap, such that the frame, trigger lever and guard element collectively define a protected trigger space. The gap may be less than 0.9 cm such that a user's finger may not enter the trigger space except from a lateral direction. The trigger lever may have an exposed actuation portion configured to be actuated by two fingers.

A double-barreled revolver has a frame, a trigger lever having a first end connected to the frame and movable between a forward rest position and a rearward actuated position, the trigger lever having a free end extending away from the frame and opposite the first end, a guard element forward of the trigger lever and having an upper end connected to the frame and a downwardly depending lower end, and the free end of the trigger lever being separated from the lower end of the guard element by a limited gap, such that the frame, trigger lever and guard element collectively define a protected trigger space. The gap may be less than 0.9 cm such that a user's finger may not enter the trigger space except from a lateral direction. The trigger lever may have an exposed actuation portion configured to be actuated by two fingers.

A Ruger® revolver has a cylinder release button for loading/unloading that is stiff. It is difficult to push into the frame to release the cylinder. A spring force keeps the cylinder locking rod pushed rearward into a locking hole. When the cylinder release button is pushed into the frame, a short lever arm moves the release arm pin forward to overcome the spring bias force rearward. The present invention attaches to the face of the release button to extend the lever arm from the fulcrum of the cylinder release rod. A bolt and/or glue can attach the extension lever arm to the face of the cylinder release face. A factory model could provide a one piece cylinder release rod with an extended rearward projecting face.

A Ruger® revolver has a cylinder release button for loading/unloading that is stiff. It is difficult to push into the frame to release the cylinder. A spring force keeps the cylinder locking rod pushed rearward into a locking hole. When the cylinder release button is pushed into the frame, a short lever arm moves the release arm pin forward to overcome the spring bias force rearward. The present invention attaches to the face of the release button to extend the lever arm from the fulcrum of the cylinder release rod. A bolt and/or glue can attach the extension lever arm to the face of the cylinder release face. A factory model could provide a one piece cylinder release rod with an extended rearward projecting face.

A firing mechanism for a firearm includes a trigger, a forcing structure, and a spring within a cylinder, wherein while the trigger is pulled, the forcing structure moves to force the cylinder to contact a barrel and to force the spring to compress, and while the trigger is returned to an idle position, the forcing structure moves to allow the spring to decompress and to force the cylinder away from the barrel.

A barrel porting system for a firearm in one embodiment includes a barrel defining an axially extending barrel bore, a porting device coupled to the barrel and including a plurality of gas portholes in fluid communication with the barrel bore, and an outer shroud encircling at least the porting device. The shroud includes at least one gas discharge port arranged to vent combustion gas from firing the firearm in an outwards direction. An annular gas collection plenum formed between the shroud and porting device is configured to collect gas from the gas portholes and discharge the gas through the at least one discharge port in the shroud. In one implementation, the plenum is formed by a recessed channel in the muzzle device which extends around the entire circumference of the device. Various threaded and unthreaded coupling methods may be used to secure the muzzle device to the barrel.

A barrel porting system for a firearm in one embodiment includes a barrel defining an axially extending barrel bore, a porting device coupled to the barrel and including a plurality of gas portholes in fluid communication with the barrel bore, and an outer shroud encircling at least the porting device. The shroud includes at least one gas discharge port arranged to vent combustion gas from firing the firearm in an outwards direction. An annular gas collection plenum formed between the shroud and porting device is configured to collect gas from the gas portholes and discharge the gas through the at least one discharge port in the shroud. In one implementation, the plenum is formed by a recessed channel in the muzzle device which extends around the entire circumference of the device. Various threaded and unthreaded coupling methods may be used to secure the muzzle device to the barrel.