Abstract: A mount for mounting a firearm sound suppressor or silencer to a firearm muzzle or muzzle device operates by using primary mounting lugs on the suppressor which engage sockets on the muzzle device. The primary lugs prevent the suppressor from axially moving with respect to the muzzle device, thus causing them to be fixed together as a unitary device. Angled bearing faces on the muzzle device and the sound suppressor are pressed against each other by rotating the sound suppressor on threads which drive the angled bearing faces together, thus tightening the primary lugs within their sockets. Backup lugs on the silencer engage an annular groove on the muzzle device to retain the silencer on the firearm to which it is mounted in case of failure of the primary lugs. Rapid attachment and detachment are supported by these structures.

Abstract: The present invention provides a novel gas impingement and recoil mitigation system for firearms that includes separate systems that reduce recoil, muzzle rise, and user fatigue and includes a system that is of variable size to match the size and caliber of firearm to which the system will attach. The system can attach to a variety of firearms through an appropriately sized standard barrel connector. As propellant gas is redirected through a ported barrel, the force of the over-pressure wave caused by the propellant blast impinges on a piston-like weight-and-spring mechanism, which thrusts forward with a force that is opposite in direction from the typical backward force that causes muzzle rise and recoil. Numerous additional aspects are disclosed.

Abstract: A method for user interaction when gaming. The method including rendering a normal view of a virtual environment of a video game for display in an HMD of a user. The method including detecting a pose of a user holding a first controller and a second controller indicating that a virtual weapon is being held. The method including detecting that the pose of the user is raised to a firing position. The method including detecting that the pose of the user is in alignment with a face of the user. The method including detecting that a first eye of the user is closed. The method including detecting an object in the virtual environment being targeted by the pose that is in alignment with the face of the user. The method including rendering a magnified view of the object being targeted in the virtual environment for display in the HMD.

Abstract: The disclosed magazine cap choke adapter allows a user to store an extra choke in place of the shotgun magazine cap. The magazine cap choke adapter is formed from a body that includes a first female threaded end, or proximal end, that threads onto the magazine adapter of the shotgun. Moving away from the proximal end, the magazine cap choke adapter tapers to a second female threaded end, or distal end, into which a choke is optionally threaded.

Abstract: A mount for mounting a firearm sound suppressor or silencer to a firearm muzzle or muzzle device operates by using primary mounting lugs on the suppressor which engage sockets on the muzzle device. The primary lugs prevent the suppressor from axially moving with respect to the muzzle device, thus causing them to be fixed together as a unitary device. Angled bearing faces on the muzzle device and the sound suppressor are pressed against each other by rotating the sound suppressor on threads which drive the angled bearing faces together, thus tightening the primary lugs within their sockets. Backup lugs on the silencer engage an annular groove on the muzzle device to retain the silencer on the firearm to which it is mounted in case of failure of the primary lugs. Rapid attachment and detachment are supported by these structures.

Abstract: A firearm muzzle accessory coupling device, system and method. The coupling device provides a front alignment taper and an intermediate outer diameter providing a plurality of successively alternating clearance recesses and pattern threaded lugs, wherein each lug provides a unique outward thread. The muzzle accessory provides a mounting interface socket having a plurality of successively alternating socket clearances and pattern threaded socket lugs along an inner circumference of a through bore. Each socket lug providing an inward thread dimensioned and adapted to receive the unique outward threaded muzzle accessory, thereby effectuating a plurality of compatible mating axial orientations between the coupling device and the firearm muzzle accessory.

Abstract: Adapters for mounting an accessory on a firearm, firearm accessories configured to mount to those adapters, and sheath or handguard assemblies of firearms are disclosed. The recited accessory adapter is substantially annular or tubular in shape, and includes at least two portions that are arranged adjacently along the barrel axis of the firearm. A rear portion is formed on the weapon side of the adapter, so that the rear portion is geometrically complementary to the front end of a firearm sheath, at least in part, and a front portion of the adapter includes a cylindrical coupling surface on the outside for coupling of the accessory, where the coupling surface includes at least one bayonet extension that projects radially outwards.

Abstract: An adjustable tuning device includes an externally threaded mounting member having a base defining an aperture and a tuning weight having internal threads configured to mate with the externally threaded mounting member. The aperture can be configured to receive a forward portion of a gun such that a threaded protrusion extends forward of the base. The mounting member can have a rear surface configured to abut a forward-facing shoulder of the gun. The tuning weight is rotatable about the mounting member to move in a range of axial positions with respect to the mounting member and a barrel axis. The mounting member can have a skirt extending from the base. The mounting member can have an external diameter at an externally threaded portion, and the tuning weight can have a rear portion with an internal diameter less than the external diameter of the mounting member.

Abstract: An inertial decoupler and suppressor assembly, associated components, and associated methods. The inertial decoupler is adjustable to change a preload of a spring biasing a piston toward an at-rest position and/or to change a permitted travel distance of the piston away from the at-rest position. The inertial decoupler can be removable from the suppressor and usable with other suppressors, or can be integrated with a dedicated suppressor.

Abstract: A muzzle adaptation system facilitates the attachment of adaptors to the muzzle of a firearm. A converter is attached to the muzzle of a firearm using existing features such as threads. The adaptors are secured to the converter by a release device that allows the adaptor to be attached without precise alignment or fasteners.

Abstract: A muzzle device mounting system having a muzzle device having muzzle device locking lug recesses; a locking collar having locking collar locking lug recesses and being rotatable relative to the muzzle device between a locked position and an unlocked position; and a pin extending from the locking collar and into at least a portion of the pin channel to limit rotational movement of the locking collar relative to the muzzle device, wherein if the locking collar is in the unlocked position, the muzzle device locking lug recesses are aligned with the locking collar locking lug recesses and if the locking collar is in the locked position, the muzzle device locking lug recesses are not aligned with the locking collar locking lug recesses.

Abstract: A muzzle brake for a firearm provided herein generally includes a housing having a chamber and an insert removably couplable to the housing such that the insert is interchangeable depending on the caliber of projectile. The insert includes a body with a central bore defining a projectile axis, the central bore at least partially extending toward an end of the housing within the chamber. The muzzle brake may further include a first lateral port extending from the chamber through the housing and be configured to expel combustion gases away from the housing and a first baffle projecting radially from the body and disposed at a location along the body configured to direct a portion of the combustion gases toward the first lateral port. The muzzle brake may further include an upward port configured to expel combustion gases in direction to counteract muzzle lift of the firearm.

Abstract: A tubular assembly for attaching accessories to gun barrels. The assembly includes a first tubular, including first interior threads on an interior surface thereof and a collet on a first end thereof. The assembly includes a second tubular, including first exterior threads on an exterior surface thereof. The first exterior threads mate with the first interior threads. The second tubular includes a ridge of knurls on the exterior surface thereof. The ridge of knurls is adapted to frictionally engage the collet when the first tubular and the second tubular are assembled.

Abstract: A barrel having a monolithic body comprising an elongate structure extending from a breach end to a muzzle end; a projectile bore extending from a projectile chamber to the muzzle end; one or more elongate recesses formed in the body, wherein each elongate recess is defined by an elongate hole extending from an open end formed proximate the muzzle end; a sleeve positioned around at least a portion of the barrel to encompass at least a portion of the barrel; and a radial ring, positioned between the barrel and the sleeve.

Abstract: An inertial decoupler and suppressor assembly, associated components, and associated methods. The inertial decoupler is adjustable to change a preload of a spring biasing a piston toward an at-rest position and/or to change a permitted travel distance of the piston away from the at-rest position. The inertial decoupler can be removable from the suppressor and usable with other suppressors, or can be integrated with a dedicated suppressor.

Abstract: A sound suppressor for a firearm having one or more barrels, with at least one projectile pathway and with one or more choke-like connectors for insertion into at least one barrel of the firearm.

Abstract: A system includes a variable choke coupled to a barrel of a shot gun, and a mechanical mechanism coupled to the variable choke and configured to adjust an amount of choke constriction of the variable choke. The system further includes a motor coupled to the mechanical mechanism, and a control system configured to determine a desired size of a shot cone of shot fired from the shot gun, determine a choke constriction position of the variable choke that produces the identified size of the shot cone, and apply control signals to the motor to cause, via movement of the mechanical mechanism, automatic adjustment of the variable choke based on the determined choke constriction position of the variable choke.

Abstract: A side-discharge muzzle brake includes a body, which includes an attachment portion and multiple ports located in the wall of the body. The side-discharge muzzle brake further includes a sleeve sized to slide over a portion of the body and to be rotatable around the body. The sleeve includes multiple openings. The side-discharge muzzle brake includes a securing assembly that allows that sleeve to be rotatable around the portion of the body in two directions for a full 360 degrees of rotation.

Abstract: A method, system, and apparatus for humanely dispatching wounded game in the field comprises a shank with a connecting end, a curved region, and a pointed end connected to a grip formed at the connecting end of the shank, and a finger loop. The grip can further comprise a series or flattened portions configured to engage the gaps in a choke tube in order to remove the choke tube.

Abstract: A barrel having a body including an elongate tubular structure extending from a breach end to a muzzle end; a projectile bore extending from a projectile chamber to the muzzle end; and a one or more tubular recesses formed in the body, wherein each tubular recess is defined by an elongate hole extending from an open end formed in an area proximate the muzzle end.

Abstract: Devices and methods facilitate a precise, measured amount of adjustment to a die used for the reloading of ammunition cartridges. A lock ring assembly and notched threads generate audible or tactile user feedback, preferably in the form of “clicks” as the lock ring advances by a precise, predetermined amount axially relative to a die body. The lock ring assembly may be a unified structure, wherein the entire lock ring assembly turns as a unit. In this embodiment, one or more ball detents in the lock ring assembly interact with notched threads on a proprietary die body. Alternatively, the lock ring assembly may be a two-part assembly that can be used with existing threaded dies with continuous un-notched threads. The die body, whether notched or not, may be used in any reloading application in standard presses, including cartridge sizing, crimping, bullet seating, or case mouth belling.

Abstract: A choke assembly for use with a shotgun, the choke assembly having a collar attachable to the muzzle of the shotgun. There is a sleeve attached to the collar, the sleeve having at least one tapered bore or aperture, a ball being received in the aperture. There is a tubular slide in surrounding relationship to the sleeve and the collar, there being annular radially outwardly and radially inwardly facing recesses on the slide and collar, respectively, which cooperate to form an annular spring pocket. There is a compression spring received in the pocket, the ball having a portion extending through the tapered bore and a threadless choke received in the sleeve, the choke having an indentation in which at least a portion of the ball is received when the choke is inserted into the sleeve.

Abstract: An extension device (1) of a firearm (500) mounts in an operating configuration, to a muzzle (555) of a barrel (550) of the firearm (500). The extension device (1) includes a main body (10) which has an inner element (11) housable inside the barrel (550) and suitable to firmly engage with an inner barrel wall (550?) and an outer element (12) which extends axially adjacent to the inner element (11) and is suitable to be arranged outside the barrel (550) with the inner element (11) housed in the barrel (550). The extension device further includes a secondary body (20) fitted axially on the main body (10) and an attachment body (30) fitted axially on the outer element (12) and fixable thereto performing an axial thrust action on the secondary body (20) until the secondary body presses against the muzzle (555) of the firearm (500).

Abstract: Adjustable stabilizing attachments for a firearm and, more particularly, to adjustable stabilizing devices that may be attached to the muzzle end of the firearm to assist in reducing forces exerted during firing, such as lateral shift, vertical displacement, or longitudinal twisting as well as assisting in suppression of muzzle flash, reduction in recoil and/or firing noise and concomitant firing concussion are herein disclosed. The multi-position devices are useful for, inter alia, adapting a firearm's capabilities to meet the needs of firing situations presented to the user, without the need to switch to alternative devices.

Abstract: A gun standoff device may include an elongated body having crenulations at a first end and an attachment mechanism at a second end. The crenulations at the first end may provide a plurality of radially disposed teeth about the circumference of the first end. The attachment mechanism may allow attachment of the elongated body to a gun barrel, a gun magazine, or other gun component.

Abstract: A tunable muzzle compensator for a weapon such as a firearm that includes a tube that extends the barrel of the weapon by fitting over the muzzle or is directly integrated into the barrel. This center tube, or modified barrel includes one or more holes along its length. One or more removable sections that have gas exit ports at various predetermined angles fit over the center section. Removable sections can be rotated to either turn off top holes on the center tube or to choose different angles of gas discharge The total effect of all the removable sections represents a particular tuning for the weapon. The weapon can be very quickly tuned on the range or in the field to compensate for weight of the projectile, the charge, and the shooting style by simply replacing and/or reversing removable sections with sections that have different angles of discharge.

Abstract: Interchangeable choke tube for the shot load of smoothbore shotgun which causes to the shot load gradually initial tightening of progressive form, expansion and final retightening (7), featuring internally initial tightening of progressive form section (8) followed by expansion section (9) and which is followed by final retightening section (10), which achieves the improvement of the effectiveness of the shot as, first, the initial tightening of progressive form section (8) featured applies to the shot charge, as it passes through it, vertical lateral pressure which splits the aggregates of shot pellets and second, the expansion section (9) which follows causes ameliorative rearrangement of the shot pellets as they are deploying in a space with larger diameter and, in this way, and their smoother entrance into the final retightening section (10) with result the improvement of their distribution within their pattern, something that is not happening with the hitherto existing ones.

Abstract: A firearm barrel accessory that quick connects and disconnects to a firearm barrel by rotating is described. The accessory may be a firearm suppressor with a silencer barrel, a mount retention ring located inside the silencer barrel that includes longitudinal grooves that lead to circumferential grooves that have a first radial side and a second radial side. The firearm barrel is attached to a muzzle break that may include a plurality of lugs that fit into longitudinal grooves. After placement in the longitudinal grooves, the silencer barrel and mount retention ring are rotated/twisted about the silencer barrel longitudinal axis so that the circumferential grooves move relative to the lugs until the lugs contact the second radial side, at which point the mount retention ring ceases to rotate while the silencer barrel continues to rotate. A ratchet retention ring may exert tension on the mount retention ring in the rearward direction.

Abstract: A firearm choke tube includes a cylindrical body, a choke interrupted thread section, and a locking tab. The choke interrupted thread section is positioned on an outer surface of the cylindrical body and configured to threadably engage an interrupted thread section of a barrel of a firearm to limit longitudinal movement of the cylindrical body relative to the barrel. The locking tab protrudes from the outer surface of the cylindrical body and is configured to interface with a detent formed in the barrel to limit rotational movement of the cylindrical body relative to the barrel.

Abstract: A firearm choke tube includes a cylindrical body, a choke interrupted thread section, and a locking tab. The choke interrupted thread section is positioned on an outer surface of the cylindrical body and configured to threadably engage an interrupted thread section of a barrel of a firearm to limit longitudinal movement of the cylindrical body relative to the barrel. The locking tab protrudes from the outer surface of the cylindrical body and is configured to interface with a detent formed in the barrel to limit rotational movement of the cylindrical body relative to the barrel.

Abstract: A muzzle attachment for a shotgun is disclosed including a first portion that has a first end, a second end, a central axis extending from the first end to the second end, and a through bore extending from the first end to the second end, concentric about the axis. The muzzle attachment also includes a second portion having a pair of opposing extensions defining a gap therebetween. Each extension has a base adjacent the second end of the first portion and a distal end extending away from the base. Additionally, the gap has a narrow end adjacent the base, a wide end adjacent to the distal end, and a pair of opposing lateral sides extending along a projection of the axis. Each of the sides includes a webbing disposed at the narrow end; wherein each webbing has an inner surface, an outer surface, and a radial thickness which tapers from the narrow end to the wide end.

Abstract: A weapon barrel of an automatic firearm contains a muzzle that is set into flexural oscillations by firing, with a damping device for damping the flexural oscillations by frictional processes between a radially projecting friction ring disposed on the muzzle and at least one friction element loaded by of a spring element. Wherein at least one friction element loaded by a separate spring element acts on both sides of the friction ring respectively and is supported so as to be axially movable relative to the muzzle.

Abstract: This invention is in relation to a shotgun choke tube made of aluminum in which sometimes this aluminum choke tube may be coated with an anodize, hard coating or plating of some sort to increase hardness, strength, lubricity, corrosion resistance, etc to the aluminum. The aluminum choke tube is composed of a cylindrical tube having a sealing face against the bore of the shotgun bore, multiple clearance diameters, an outside body diameter, threads and on the extended version choke tubes, there is a portion of diameter that extends outward beyond the end of the muzzle of the shotgun barrel. The inside diameters are comprised of tapers, sometimes straights and multiple geometries to act as somewhat of a funnel. The aluminum choke tube is held in place securely inside the shotguns barrel by means of usually a thread or other geometrical design created by the shotgun manufacturer.

Abstract: A muzzle attachment for a shotgun is disclosed including a first portion that has a first end, a second end, a central axis extending from the first end to the second end, and a through bore extending from the first end to the second end, concentric about the axis. The muzzle attachment also includes a second portion having a pair of opposing extensions defining a gap therebetween. Each extension has a base adjacent the second end of the first portion and a distal end extending away from the base. Additionally, the gap has a narrow end adjacent the base, a wide end adjacent to the distal end, and a pair of opposing lateral sides extending along a projection of the axis. Each of the sides includes a webbing disposed at the narrow end; wherein each webbing has an inner surface, an outer surface, and a radial thickness which tapers from the narrow end to the wide end.

Abstract: A firearm with a barrel that uses an ammunition discharge chamber that includes improved throat located between the chamber's free bore and the rifle bore. The improved throat includes a relatively short, inward aligned first step, an intermediate elongated cylindrical body, and a longer, inward aligned second tapered step. Formed on the inside surfaces of the first step, the elongated body and the second step are rifling grooves and lands that gradually their depths and heights from rear to front direction. The two steps are tapered inward between 1.0 to 1.5 degrees. Using a short first step, an elongated cylindrical body with straight sidewalls, a longer second step with continuous grooves and lands that begin gradually in depth and height from rear to front directions, chamber pressure is reduced thereby enabling more gun powder to be used and bullet misalignment in the rifle bore is reduced.

Abstract: A firearm choke tube includes a cylindrical body, a choke interrupted thread section, and a locking tab. The choke interrupted thread section is positioned on an outer surface of the cylindrical body and configured to threadably engage an interrupted thread section of a barrel of a firearm to limit longitudinal movement of the cylindrical body relative to the barrel. The locking tab protrudes from the outer surface of the cylindrical body and is configured to interface with a detent formed in the barrel to limit rotational movement of the cylindrical body relative to the barrel.

Abstract: A weapon barrel of an automatic firearm contains a muzzle that is set into flexural oscillations by firing, with a damping device for damping the flexural oscillations by frictional processes between a radially projecting friction ring disposed on the muzzle and at least one friction element loaded by of a spring element. Wherein at least one friction element loaded by a separate spring element acts on both sides of the friction ring respectively and is supported so as to be axially movable relative to the muzzle.

Abstract: A shotgun has a telescoping barrel made of concentric barrel sections slidably engaged together. These include at least an inner barrel section and an outer barrel section. A grip on the outer barrel section aids telescopic movement. A locking pin secures or releases the barrel sections. The barrel sections have protrusions that interfere with further outward movement once fully telescoped out. The grip may have a channel to permit a pistol grip to slide onto the grip. A second pistol grip may be connected to the trigger. The butt of the gun may slide out to make a shoulder rest. A butt plate is connected to a rod that slides into and out of the shotgun. The rod has teeth that engage a spring-loaded arm to secure the rod in an extended position. A compression or tension spring may bias the concentric barrel sections in an extended or shortened configuration.

Abstract: A shotgun choke system consisting of four zones, a the first zone being a compression or constriction zone; the second zone being a stabilization zone; the third zone being a second compression or constriction zone; and the forth and final zone being a second stabilization zone. The shot package is compressed and constricted into a tight, uniform shot delivery package, and the wad package is completely separated from the shot package. The shot package therefore leaves the barrel of the choke, first, while gasses from the shot escape through a muzzle break and the wad package exits following the shot package, drastically reducing recoil and improving the shot pattern over prior art choke embodiments.

Abstract: The invention relates to systems, methods and devices for controlling the dispersion of shot or other projectiles fired from a weapon such as a shotgun. Embodiments according to the invention employ an inner cylindrical chamber that is divided at a median transverse plane into forward and rear sections. The rear section of the chamber tapers toward the median transverse plane and includes a number of radial vents that open into an outer chamber that provides one or more gas bypass channels into the forward section of the tubular chamber. Alternatively, channels function as unitary vents and outer chamber to provide for a gas bypass. The forward section tapers toward a forward muzzle opening. When a multiple projectile load/wad is fired from the weapon, expanding gas is sealed behind the load until it has advanced past the radial vents at which point, gas is allowed to expand into the outer chamber resulting in a momentary pressure drop and reduced propulsion force behind the wad/load.

Abstract: A shotgun choke system consisting of four zones, a the first zone being a compression or constriction zone; the second zone being a stabilization zone; the third zone being a second compression or constriction zone; and the forth and final zone being a second stabilization zone. The shot package is compressed and constricted into a tight, uniform shot delivery package, and the wad package is completely separated from the shot package. The shot package therefore leaves the barrel of the choke, first, while gasses from the shot escape through a muzzle break and the wad package exits following the shot package, drastically reducing recoil and improving the shot pattern over prior art choke embodiments.

Abstract: A bullet velocity enhancing rifle attachment assembly a sleeve having a first end, a second end and a perimeter wall. The sleeve has an aperture therein extending into the first end and outwardly of the second end. The aperture is defined by an inner wall including a first portion adjacent to the first end, an second portion adjacent to the second end and a central portion positioned between the first and second portions. The central portion has an toroidal shape. A coupler attached to the second end of the sleeve is releasably engageable with a gun barrel to align the aperture with the gun barrel. Pressure from a front side of a bullet traveling down the gun barrel is forced into the central portion to travel around the toroidal shape and back into the aperture toward the first portion, behind the bullet, as the bullet travels through the central portion.

Abstract: An adjustable muzzle brake in which an interior volume of the muzzle chamber can be varied without the use of tools which allows shooters to adjust the flow of the propellant gases and thereby allow shooters to determine and select the optimum recoil for their shooting preference.

Abstract: Exchangeable choke for a fire arm with a smooth gun barrel, whereby said choke is provided with mechanical coupling means to mount and dismount the choke, characterized in that the choke is equipped with additional sealing means so as to seal the choke, at least in one place, in relation to the gun barrel, as well as to prevent the choke from being unscrewed during the shooting.

Abstract: A shotgun gas exchanger comprising a gas exchanger tube for connectively engaging with a shotgun barrel and a choke disposed in the gas exchanger having longitudinal axial channels on the exterior surface thereof, such that gas from the shotgun barrel flows through the longitudinal axial channels and gathers in front of the muzzle end of the choke to retard the release of pellets from a wadding cup exiting the muzzle.

Abstract: A shotgun barrel of a construction that reduces recoil is provided. The shotgun barrel includes a smooth, non-rifled bore and a choke approximate the muzzle of the barrel. A plurality of vent holes through the barrel and extending into the bore in equal number and in alignment on opposing sides of the barrel along a length of the barrel that is inward of the choke, the sum of the transverse area of each of the plurality of vent holes not exceeding 50% of the muzzle area. A shotgun including the barrel of reduced recoil is also provided.

Abstract: Flash suppressors having novel expansion features are disclosed. In one embodiment, a suppressor includes an attachment portion adapted to attach to a gun barrel, and a suppressor portion coupled to the attachment portion. The suppressor portion has a suppressor bore that is adapted to be aligned with a longitudinal axis of the gun barrel to allow a projectile from the gun barrel to pass therethrough. The suppressor bore is defined by at least one bore surface having at least one expansion groove disposed therein. The expansion groove may be partially-circumferentially disposed about the suppressor bore, or may include a plurality of expansion grooves. In another embodiment, a flash apparatus includes a suppressor portion having a plurality of longitudinally elongated members spaced apart about a circumference of the suppressor bore, each member being separated from adjacent elongated members by a longitudinal slot, at least one longitudinal slot having non-parallel sidewalls.

Abstract: A shotgun gas exchanger comprising a gas exchanger tube for connectively engaging with a shotgun barrel and a choke disposed in the gas exchanger having longitudinal axial channels on the exterior surface thereof, such that gas from the shotgun barrel flows through the longitudinal axial channels and gathers in front of the muzzle end of the choke to retard the release of pellets from a wadding cup exiting the muzzle.

Abstract: The present invention relates to a silencer for reducing muzzle blast and noise of firearms or similar devices. The present silencer has a hollow cylindrical or other shape casing comprising front and rear end caps and an opening aligned along a longitudinal axis defining a passage for a projectile and propellant gases to emerge from the muzzle opening. A plurality of serially placed baffles of symmetrical or slanted orientation and intervening coaxial spacers are positioned within the casing and define a multitude of chambers among the baffles, spacers, and outer housing. The baffles shear propellant gases away from the projectile path and through openings or ports into additional chambers formed between the spacers and outer housing. The arrangement of baffles and spacers provides flow-impeding paths, dispersion, and controlled expansion of gases and lowers gas temperature to reduce audible noise and observable signature of the muzzle blast.

Abstract: A choke to be used with a muzzle of a gun may include a housing which may include an inner surface and an outer surface, and the housing may include a substantially central bore. The inner surface may inwardly taper at the distal end of the choke, and the inner surface may include a first depression having a first dimension. The inner surface may include a second depression having a second dimension, and the inner surface may include a third depression having a third dimension. The inner surface may include a fourth depression having a fourth dimension, and the first dimension may be substantially equal to the third dimension. The second dimension may be substantially equal to the fourth dimension.