Abstract: 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.

Abstract: Provided is a pump-action firearm having a frame. A barrel having a chamber is supported on the frame. A rotating ammunition clip has a plurality of circumferentially spaced cartridge sockets and is removably supported by the frame. A bolt is manually slidably cycled between in-battery and retracted positions. The bolt is moveable into a socket to push a cartridge out of the socket and into the chamber to the in-battery position and retractable to extract the cartridge from the chamber and back into the socket.

Abstract: A method of firing a firearm includes compressing a main spring to rotate a latch pin lever; 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.

Abstract: A compact firearm has a first frame portion including a barrel defining a barrel axis, a second frame portion including a firing mechanism configured to discharge a cartridge residing in a chamber of the barrel, the second frame portion pivotally connected to the first frame portion to pivot about a pivot axis offset from and parallel to the barrel axis, the first frame portion defining a first mating feature formed as a first surface of revolution about the pivot axis, the second frame portion defining a second mating feature formed as a second surface of revolution about the pivot axis, and the first and second mating features mating closely with each other to prevent relative movement between the first and second frame portions except in relative rotation about the pivot axis. The first and second mating features may be dovetail elements.

Abstract: 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.

Abstract: An intrinsically safe firearm may include a handle and a frame connected by a pivot pin. One or more latches of the firearm can temporarily fix the firearm in a stowed orientation or a deployed orientation. In the deployed orientation, a magazine of the firearm can be removed from the handle; a slide of the firearm can be removed from the frame; a magazine safety allows a firing pin to strike a primer of a round in the firearm; and a trigger of the firearm is accessible to discharge the round in the firearm. In the stowed orientation, the magazine is not removable from the handle; the slide is not removable from the frame; the magazine safety prevents the firing pin from striking the primer; and the trigger of the firearm is not accessible.

Abstract: A Firearm grip that attaches underneath a handguard and helps stabilize shooting with as little as one finger on the grip. The grip has a rail channel on the top portion, while the lower portion is circular shaped, extending downward and parallel with the firearm barrel. The top and lower portions of the device are one solid piece. The front and back of the circular portion contain separate voids. On each side of the voids are positions to mount a sling clip. A swivel sling attachment can be mounted to the bottom center of the circular portion.

Abstract: A firearm barrel with non-metal outer sleeve preferably includes an elongated tube, a first non-metal tube, a second non-metal tube, a sleeve nut and a coupler bushing. A first raised sleeve support section and a raised coupler section are formed on the elongated sleeve. The raised coupler section is formed in substantially a middle of the elongated tube. The bushing inner diameter is sized to slidably receive an outer diameter of the raised coupler section. The first and second non-metal tubes include a tube inner diameter and a plurality of openings formed through a wall thereof. The tube inner diameters are sized to slidably receive an outer diameter of the first raised sleeve support section and each end of the coupler bushing. The sleeve nut retains the first and second non-metal tubes and the coupler bushing on the elongated tube. A second embodiment includes a single non-metal tube.

Abstract: A firing mechanism for a firearm includes a frame, a barrel attached to the frame, a cylinder attached to the frame and including a chamber that is alignable with the barrel, and a latch pin in direct contact with the cylinder that moves forward to force the cylinder forward to directly contact the chamber with the barrel when a trigger is pulled.

Abstract: Disclosed herein is a smart electroshock device. The smart electroshock device includes: a main body provided therein with electronic components to launch a projectile, the projectile being adapted to be stuck in a target and apply an electric shock to the target; a cylinder body coupled to one side of the main body via a hinge and comprising a cylinder; and a plurality of cartridges mounted in the cylinder and each comprising the projectile, wherein the projectile is launched from the cylinder through manipulation of the main body, and the cylinder is rotatably coupled to the cylinder body. The smart electroshock device according to the present invention can launch a plurality of projectiles consecutively using a revolving cylinder. In addition, the smart electroshock device can be used as a stun gun without removing a projectile in the cartridge which is in a state to be launched.

Abstract: A handgun that can be configured to different firing settings. The settings provide for selectively firing a single round or two or more rounds. The handgun can include a body with two or more barrels. The handgun can also include a cylinder with different chambers positioned into groups that align with the barrels. The handgun includes a switch that can be moved to configure the handgun between the different settings.

Abstract: 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.

Abstract: A rifle grip device may include a body configured to be attached to a pistol grip interface of a firearm with the body having a first end and a second end. A receiver plate may be disposed on the body, and the receiver plate may have a receiver mating surface. A stock plate may be disposed on the body, and the stock plate may have a stock mating surface disposed between the receiver plate and the second end. A one or more finger ridges may be disposed on the body opposite to the stock plate. One or more finger surfaces may extend along the body and onto and/or between the finger ridges so that the one or more finger surfaces may be generally horizontally aligned between the first end and second end of the body.

Abstract: A firearm support attaches to a lower surface of a firearm and helps steady the firearm during shooting from almost any firing position. The support has a body member that has a firearm lower railing receiving channel on its upper surface and a downwardly and forwardly curving claw extending from the lower surface at the front. The claw has a rounded edge and a centrally disposed wedge opening. The lower surface of the body member is also curved as is the rear surface. A pair of extendions extends outwardly, one from each side of the body member just above the upper end of the claw and each has a forward facing surface that is flat.

Abstract: A structure of a wheel-type positioning device includes a gun body, a wheel and a grip portion. A bullet is placed into a receiving slot of the wheel through a lead trajectory on the gun body. The receiving slots of the wheel can sequentially correspond to a barrel to complete loading actions through frontward and rearward reciprocating displacement actions of the grip portion, and through a linking rod of the grip portion driving a limiter thereon to rotate the wheel.

Abstract: This disclosure relates to a system and method for storage of a modular cartridge within a cavity formed in a portion of a firearm, wherein the cavity is not the magazine well of the firearm. The disclosure provides for a system for disengagebly retaining such modular cartridges, as well as multiple embodiments of cartridges which may be retained therein. Such embodiments of modular cartridges include: a miniature magazine (mini-mag) which may be used to store ammunition, and which may be operable as a magazine for the firearm; a dry box which may be used to store materials in a manner in which they are protected from the ambient environment; a monopod which may be used to help support a firearm; a flashlight; and a battery charger, which may provide for a usb output.

Abstract: 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.

Abstract: A firearm system having separate frame, action, & lock systems is disclosed. The firearm system is closed, sealed, and inaccessible when in safe mode. The physical gripping of the firearm allows access to a lock input component which is then physically actuated at which point if a lock code has been input correctly, the firearm system changes from safe mode to firing mode thereby allowing use as a firearm. Upon physical release of the grip, the firearm immediately returns to safe mode.

Abstract: The present invention is revolver louver which redirects the hot propellant gases which leak from the barrel-cylinder gap away from the user. The louver provides at least one directional passages which control the flow of propulsion gases after firing the revolver. Numerous embodiments are disclosed including some having an expansion capability to further block gas passage and one embodiment which is an extension of the revolver frame itself. One embodiment further comprises an expansion groove to further block the passage of propulsion gases. As such, the present invention's general purpose is to provide a new and improved revolver that is more compact and safer for the user than a conventional revolver.

Abstract: The present invention is revolver louver which redirects the hot propellant gases which leak from the barrel-cylinder gap away from the user. The louver provides at least one directional passages which control the flow of propulsion gases after firing the revolver. Numerous embodiments are disclosed including some having an expansion capability to further block gas passage and one embodiment which is an extension of the revolver frame itself. One embodiment further comprises an expansion groove to further block the passage of propulsion gases. As such, the present invention's general purpose is to provide a new and improved revolver that is more compact and safer for the user than a conventional revolver.

Abstract: A rail is mounted solely to a barrel nut so that the rail is free-floating and does not affect movement of the barrel when the firearm is fired. The rail may have first and second wedges that are drawn together and frictionally engage a smooth exterior surface of the barrel nut in order to frictionally engage the wedges and the barrel nut. The first and second wedges have contact surfaces defined by a radius which is equal to a radius of the exterior surface of the barrel nut. By forming the contact surfaces of the first and second wedges to have a radius equal to the radius of the barrel nut, the maximum area of the contact surfaces contact or engage the exterior surface of the barrel nut to maximize frictional engagement between the barrel nut and the wedges.

Abstract: Provided is a revolver with a two chambers cylinder, of the type having a low profile and with no protruding parts from the frame. The revolver includes a frame which has a grip at its rear portion, a trigger at its lower portion and a barrel at its front portion. The frame further includes a central opening that defines the cylinder housing. The cylinder has an oblong shape and has two chambers, radially opposite with respect to the rotation axis of the cylinder. The cylinder rotation before firing is obtained by means of the trigger actuation, which causes an upward movement of the cylinder impeller and the consequent rotation of the gear, due to interaction between the pinion and the teeth of the cylinder impeller. The transfer of the rotational movement of the gear to the cylinder is made from a ratchet, which is partially arranged within said cylinder.

Abstract: The present invention is revolver louver which redirects the hot propellant gases which leak from the barrel-cylinder gap away from the user. The louver provides at least one directional passages which control the flow of propulsion gases after firing the revolver. Numerous embodiments are disclosed including some having an expansion capability to further block gas passage and one embodiment which is an extension of the revolver frame itself. One embodiment further comprises an expansion groove to further block the passage of propulsion gases. As such, the present invention's general purpose is to provide a new and improved revolver that is more compact and safer for the user than a conventional revolver.

Abstract: In various embodiments, a multi-barrel revolver and/or firearm system may comprise a cylinder barrel. The cylinder barrel may be removable from a frame. The cylinder barrel may comprise one or more chambers coupled to one or more barrels. The cylinder barrel may be further configured to shoot a plurality of calibers of ammunition. In various embodiments, the cylinder barrel may allow an operator to scavenge and fire any caliber of ammunition.

Abstract: Aspects described herein relate to an open chamber gun mechanism comprising a frame and a cylinder assembly that forms an open chamber positioned for rotation within the frame, said open chamber including an insert positioned within the open chamber, the insert forming an expandable region between the open chamber and cylinder. According to one embodiment, the insert is configured to deflect into the expandable region upon firing the open chamber gun mechanism.

Abstract: The present invention is a spring-actuated, concealable revolver utilizing a flattened cylinder shape and a unique off-chamber placement of the cylinder when in a stowed safe mode. An extendable grip tag may also be employed to provide a further reduced profile. Various grip styles, unloading mechanisms and advancing actions may be employed with the revolver. Single and double action embodiments are disclosed.

Abstract: A functional metallic and autonomous structure for fire-arms and revolvers is described. The revolver composed of metal/plastic, has a metallic structure, and is composed of the cylinder frame, provided with a hole having an internal thread for receiving and sustaining the revolver barrel. All the components of the discharge mechanism are embedded and/or sustained in said cylinder frame, defining the metallic structure, through which the junction of said cylinder frame, of the barrel and the components of the discharge mechanism will result in a semi-finished, fully functional revolver. The revolver also comprises at least a rear cover, a plate and a polymeric piece, intended for coating/covering at least a part of the metallic structure.

Abstract: An accessory is mountable to the side plate of a gun. The accessory may be a sighting device including a light source (preferably a laser), and a power source connectable to the light source. The side plate is positioned on the gun, which is preferably a revolver, preferably by being screwed to it. The side plate includes an attachment mechanism that is preferably located behind the trigger guard and behind the gun cylinder, wherein the accessory is attachable to the attachment mechanism.

Abstract: A revolver cylinder is rotated at least approximately at a speed that corresponds to the normal rate of fire of a weapon. When a predetermined loading step is reached, the trigger of the weapon is controlled such that fire can be opened essentially without delay. The weapon is fired without break immediately after (with) the loading process. At the same time, the weapon is transferred, thus only directly before firing, from a secure SAFE state to the CHARGED state, whereby the safety standards of the weapon are significantly improved. The time during which the weapon is in the state of operational and firing readiness and not in the SAFE state is minimized or entirely eliminated, which considerably increases the operating safety. Extending the time in the SAFE state allows the level of testing for the weapon (for example for the trigger) to be greater, which in turn results in greater reliability of the weapon.

Abstract: A gun or other projectile launching device includes a frame, and a barrel, including a bore therethrough, held in position by the frame. A cylinder is rotatable attached to the frame in close proximity to an inner end portion of the barrel, the cylinder having multiple chambers and configured to sequentially and longitudinally align a chamber with the bore of the barrel. A sleeve is slidingly positioned over the inner end portion of the barrel. The sleeve has a front face with a central opening therethrough, that has a size less than an inner diameter of the sleeve, but no smaller than a diameter of the bore through the barrel. The sleeve is configured to slide back, substantially in response to gas pressure, until the front face of the sleeve is forcibly maintained in contact with the cylinder to eliminate a gap between the cylinder and the barrel.

Abstract: A rimless cartridge cylinder assembly is used for adapting revolvers which typically require the use of rimmed cartridges to accept rimless cartridges. The assembly includes an extractor mechanism having an extractor rod extending axially through a center passage provided in a cylinder having chambers adapted to receive cartridges. The extractor mechanism has an axially extendable extractor head assembly disposed at a cartridge loading end of the cylinder. The head assembly includes a plurality of spring biased projections housed therein which extend radially into engagement with corresponding grooves in rimless cartridges as they are loaded into each chamber. After discharge, rearward displacement of the head assembly allows the engaged projections to remove the spent cartridges from each chamber. Utilizing the rimless cartridge cylinder assembly, rimless cartridges typically used only with automatic hand guns can be loaded and fired in a revolver with long term reliably.

Abstract: A gun or other projectile launching device includes a frame, and a barrel, including a bore therethrough, held in position by the frame. A cylinder is rotatable attached to the frame in close proximity to an inner end portion of the barrel, the cylinder having multiple chambers and configured to sequentially and longitudinally align a chamber with the bore of the barrel. A sleeve is slidingly positioned over the inner end portion of the barrel. The sleeve has a front face with a central opening therethrough, that has a size less than an inner diameter of the sleeve, but no smaller than a diameter of the bore through the barrel. The sleeve is configured to slide back, substantially in response to gas pressure, until the front face of the sleeve is forcibly maintained in contact with the cylinder to eliminate a gap between the cylinder and the barrel.

Abstract: Aspects described herein relate to an open chamber gun mechanism comprising a frame and a cylinder assembly that forms an open chamber positioned for rotation within the frame, said open chamber including an insert positioned within the open chamber, the insert forming an expandable region between the open chamber and cylinder. According to one embodiment, the insert is configured to deflect into the expandable region upon firing the open chamber gun mechanism.

Abstract: In a revolver having a frame, carrying a barrel and a revolving cylinder having multiple cartridge chambers therearound, the improvement comprising: a) a sliding sleeve positioned over an inner end portion of the barrel, said end portion of the barrel and inner diameter of the sliding sleeve closely mated; and, a) a sliding sleeve positioned over an inner end portion of the barrel, said end portion of the barrel and inner diameter of the sliding sleeve closely mated; and, b) said sliding sleeve having a front face having a central opening therethrough having an inner diameter nominally equivalent to marginally larger than, a bore through the barrel. Whereafter firing, the sliding sleeve is instantaneously driven back contacting its front face with the revolving cylinder, thereby eliminating any gap between the revolving cylinder and the barrel, preventing exploding gas from escaping therethrough, and substantially increasing bullet discharge velocity and energy.

Abstract: Revolvers with cylinder shrouds include first and second shroud portions, each having a cylindrical wall portion having a length at least as great as the length of a revolver cylinder and an interior surface shaped to be closely spaced apart from an exterior surface portion of the cylinder. The first and second shroud portions each include a fastening mechanism operable to removably connect the first shroud to a revolver frame. The first and second shroud portions each include a fastening element operable to removably connect the first and second shroud portions to the frame to cover the cylinder. The first and second shroud portions may have a major cylindrical wall portion having a radius of curvature centered on axis defined by the cylinder when the first and second shroud portions are connected to the frame.

Abstract: A firearm comprising a frame, a barrel with a firing axis connected to the frame, a cylinder pivotally attached to the frame and positioned within an opening in the frame and having a plurality of firing chambers sized to receive a cartridge, and a firing mechanism including a trigger attached to the frame to actuate the firing mechanism, wherein the frame is substantially nonmetallic and includes at least one metal insert having a polymer over-molding. A cylinder retaining mechanism selectively retains the cylinder in a first position within a window in the frame and comprises a biasing pin operatively attached to a yoke and which is oriented in a direction substantially transverse to the bore axis when the cylinder is in the first position.

Abstract: Revolvers with cylinder shrouds include first and second shroud portions, each having a cylindrical wall portion having a length at least as great as the length of a revolver cylinder and an interior surface shaped to be closely spaced apart from an exterior surface portion of the cylinder. The first and second shroud portions each include a fastening mechanism operable to removably connect the first shroud to a revolver frame. The first and second shroud portions each include a fastening element operable to removably connect the first and second shroud portions to the frame to cover the cylinder. The first and second shroud portions may have a major cylindrical wall portion having a radius of curvature centered on axis defined by the cylinder when the first and second shroud portions are connected to the frame.

Abstract: A revolver that has a cylinder that is capable of receiving a cylinder clip so that multiple cylinder clips can be used to quickly reload the revolver.

Abstract: A revolver with light-weight firing control housing includes a cylinder frame supporting a rotatable cylinder defining a plurality of cartridge-receiving chambers and a firing control housing made of a non-metallic material. The firing control housing attaches to the cylinder frame and supports firing control mechanism components, such as a trigger and a pivotable hammer actuated by the trigger. In one embodiment, the firing control housing may be made of a polymer and the cylinder frame may be metal.

Abstract: A functional metallic and autonomous structure for fire-arms and revolvers is described. The revolver composed of metal/plastic, has a metallic structure, which is composed of the cylinder frame, provided with a hole having an internal thread for receiving and sustaining the revolver barrel. All the components of the discharge mechanism are embedded and/or sustained in said cylinder frame, defining the metallic structure, through which the junction of said cylinder frame, of the barrel and the components of the discharge mechanism will result in a semi-finished, fully functional revolver. The revolver also comprises at least a rear cover, a plate and a polymeric piece, intended for coating/covering at least a part of the metallic structure.

Abstract: A weapon system for urban combat incorporating an automatic gun having a short recoil, a feed system with gun driven box magazines of different capacities, a detachable link-belt feed, spring buffered barrel and bolt recoil absorbing arrangement, and simplified fire control.

Abstract: A revolver for firing high velocity ammunition includes a frame, a cylinder, a barrel, and a firing mechanism. The revolver may include one or more of the following, each of which is especially adapted for use in the context of firing high velocity ammunition: spacers for adjusting a barrel-cylinder gap, for eliminating broaching of the rearward surface(s) of the barrel; a forcing cone formed in the rearward opening of the barrel for accommodating deformed projectiles; a reflective surface (e.g., mirrored surface) provided on the cone and/or barrel rearward surfaces, for reducing erosion resulting from using high velocity ammunition; gain-twist rifling in the barrel for a smoother transition to full projectile velocity; a larger diameter, hardened firing pin bushing for minimizing brass flow in the rearward direction; and a front sight assembly that minimizes lateral shift or drift of the sight pin during firing.

Abstract: A compact and foldable survival tool includes a firearm including a trigger and safety lever with many unique features including a compact and folding survival tool with an easy-to-manufacture top strap, a rack and pinion hammer actuator, dual lasers for distress signaling and target and ranging sighting, reconfigurable multiple tools, contained child-safety lock system, folding trigger with safety lever, cam hammer lock, floating firing pin, and cylinder pin assembly positive cylinder lock, for example.

Abstract: A polymeric revolver including a frame, a cylinder mounted in a rectangular aperture in the frame via a yoke, and a cylinder retaining mechanism is provided. The cylinder retaining mechanism includes multiple assemblies, which lock the yoke in the cylinder-closed position, including: (1) an extractor, a locking bolt and a locking bolt retainer that house an extractor rod spring and engage a ratchet hub driver, hub drive center pin and central pin plate that house a ratchet drive spring; (2) a star-shaped configuration of grooves and ridges on the extractor and the ratchet hub driver, respectively; (3) a rear taper of the locking bolt that engages a concave recess at the axial center of the rounded groove of the locking bolt recess; and (4) an annular ring that engages an inner wall of an annular opening in a breach face of the frame.

Abstract: A polymeric revolver including a frame, a cylinder mounted in a rectangular aperture in the frame, a cylinder retaining mechanism and a cylinder releasing mechanism is provided. The cylinder retaining mechanism includes two assemblies: (1) an extractor, locking bolt and locking bolt retainer that house an extractor rod spring, and (2) a ratchet hub driver, hub drive center pin and central pin plate that house a ratchet drive spring. The two assemblies are biased toward one another forming a locking engagement of the extractor and the ratchet hub driver. The locking engagement is enhanced by a star-shaped configuration of grooves and ridges on the extractor and ratchet hub driver, respectively. The cylinder releasing mechanism includes a cylinder release lever that actuates the hub drive center pin and ratchet hub driver out of locking engagement with the extractor, and an ambidextrous thumb piece that facilitates access to the cylinder release lever.

Abstract: A polymeric revolver including a frame, a cylinder mounted in a rectangular aperture in the frame via a yoke, and a cylinder retaining mechanism is provided. The cylinder retaining mechanism includes multiple assemblies, which lock the yoke in the cylinder-closed position, including: (1) an extractor, a locking bolt and a locking bolt retainer that house an extractor rod spring and engage a ratchet hub driver, hub drive center pin and central pin plate that house a ratchet drive spring; (2) a star-shaped configuration of grooves and ridges on the extractor and the ratchet hub driver, respectively; (3) a rear taper of the locking bolt that engages a concave recess at the axial center of the rounded groove of the locking bolt recess; and (4) an annular ring that engages an inner wall of an annular opening in a breach face of the frame.

Abstract: A rotary clip rotation mechanism for an air gun, having a nail for engaging with a nail engagement section provided in the rotary clip and causing rotation of a rotary clip, comprises an L-shaped arm, capable of rotating about an arm shaft, with a muzzle side end opening section formed from a curved surface section; an arm elastic section provided at a position contacting the tip of the curved surface section of the L-shaped arm, a nail support arm provided so as to rotate on a gun rear end side of the L-shaped arm by means of a connecting elastic section, and a nail urged in the direction of the tip end by a nail elastic section provided on a tip of the nail support arm.

Abstract: A pistol has a forwardly extending cylindrical shaft with a cylindrical bearing surface. A rotatable cylinder is mounted on the bearing surface. A cylindrical chamber in the rotatable cylinder receives a cartridge. A firing pin ring with a firing pin aligned with the chamber is mounted on the bearing surface. A hammer safety lock includes a hole in the firing pin ring with a rearwardly extending pin. A barrel receives the cylindrical shaft. A barrel sleeve is positioned between the barrel and the shaft. A cartridge extraction tool is operable after axial sliding and separation between the cylinder and the cylindrical shaft. The cartridge extraction tool is adapted to be inserted into the chamber of the cylinder from the end remote from the firing pin ring to remove a cartridge.

Abstract: A revolver that has firing means arranged so as to substantially raise the resting point of the middle finger of the hand on the handle.

Abstract: A revolver with light-weight firing control housing includes a cylinder frame supporting a rotatable cylinder defining a plurality of cartridge-receiving chambers and a firing control housing made of a non-metallic material. The firing control housing attaches to the cylinder frame and supports firing control mechanism components, such as a trigger and a pivotable hammer actuated by the trigger. In one embodiment, the firing control housing may be made of a polymer and the cylinder frame may be metal.