Abstract: A less lethal projectile system is revealed. The less lethal projectile system includes an outer shell and a projectile. A rimfire blank mounting slot is arranged at a rear end of the outer shell and offsetting a center of the outer shell. A rimfire blank is mounted in the rimfire blank mounting slot. A firing pin of a launcher strikes an edge of the rimfire blank eccentrically to push the projectile out. When the projectile is fired and reached a target, the projectile is broken and effective compositions loaded therein is scattered. The projectile is less lethal and getting broken easily for allowing the effective compositions loaded in the projectile to be spread out within a certain range.

Abstract: A laser bore sight with arbor system is disclosed which includes a bore sight with a housing, a laser and an activation switch. The system also includes a plurality of arbors, each arbor having a sleeve with an interior channel configured to be received the bore sight. Each arbor is configured to fit within the bore and/or breach of a firearm. The exterior configuration of each arbor is different and specifically configured to fit a specific caliber of firearm. The sleeve has a rear end to which is coupled an end cap having and opening through which the bore sight activation switch extends.

Abstract: A simulation laser training cartridge for dry-firing practice adapts to the wear condition of a given firearm and provides a convenient way of measuring the barrel erosion. The cartridge uses multiple adjustable interfacing parts that can be applied selectively and independently according to the condition of the barrel to ensure a snug fit in 3-dimensions. In a 2-unit kit embodiment of the invention, the muzzle unit can work with multiple chamber units for a multi-chamber firearm. The cartridge also includes internal modules for laser property management, status monitoring, movement tracking, memory, and communication to help a user manage the device and allow for advanced training applications. By changing the laser property, the laser training cartridge can work as a bore sight. The cartridge may further include a means to attach an external part, so the external part comprises a means to distinguish a longitudinal position inside said barrel.

Abstract: An auxiliary caliber weapon system that allows a conventional shotgun, such as a pump action shotgun or other firearm, including artillery weapons to be modified to fire ammunition rounds of a selectable caliber. The system includes a barrel assembly and to load an ammunition round within the shotgun or other firearm and a shotgun shell adapter of a selected auxiliary caliber is utilized. The shotgun includes a stock with grip a receiver and an internal magazine. The shotgun barrel is removed and the system's barrel assembly is attached to the shotgun, interfacing with the receiver. An ammunition round of a selected auxiliary caliber is inserted into the adapter, which is then placed into the magazine via a loading port. When the shotgun pump is actuated the adapter with the auxiliary caliber round is loaded from the magazine into the receiver, and is ready to be fired.

Abstract: A non-centerfire mechanical firing device designed to operate with a non-centerfire cartridge, wherein a conventional centerfire or rimfire cartridge is not able to be fired from the non-centerfire firing device.

Abstract: A shotgun ammunition conversion system has a detachable magazine well having a sleeve defining a rectangular passage adapted to removably receive an ammunition magazine, a boss extending forward of the sleeve and at a level above at least a portion of the sleeve, the boss being adapted to be received in the rear aperture of the magazine tube, and a tang extending rearward of the sleeve and defining a tang aperture operable to receive a fastener associated with a shotgun frame to secure the magazine well to the shotgun with the sleeve proximate and aligned with the loading port when the boss is received in the rear aperture of the magazine tube. The boss may have a lower cylindrical surface portion operable to contact a lower portion of the magazine tube adjacent to the rear aperture. The boss may be a cylindrical body.

Abstract: A paintball marker adapter kit that enables a paintball marker with a .68 caliber barrel to use .50 caliber paintballs. In one embodiment, the kit includes a hollow barrel tube, a replacement power tube, a replacement linkage arm, and optional feed ball adapters that into the marker's existing ammo feed hopper or a replacement ammo feed hopper. The barrel tube includes a rear bolt section that extends longitudinally from the proximal end of the barrel. The marker's existing front bolt, power tube and linkage arm are removed and replaced by the replacement power tube and replacement linkage arm. The barrel tube is hollow with a center bore configured to receive a .50 caliber paintball and receive the front air tube on the power tube. The barrel tube also includes a ball hole configured for a .50 caliber paintball that drops vertically from the ammo feed elbow and a blocking pin and latch hole. The kit may include a velocity limiting device that fits into the power tube.

Abstract: A device configured for insertion in the barrel of a shotgun for firing a rimfire ammunition round, and in particular, a .22 magnum rimfire round, in the shotgun. The device includes a carrier defining a bore that receives at least one rimfire ammunition round and a spring-biased extractor connected to the carrier and constructed to automatically withdraw a rimfire ammunition round from the bore upon the action of the shotgun being opened. The present invention may also include the spring-biased extractor being configured to automatically move to a retracted position relative to the carrier upon the action of the shotgun being closed and to automatically move to an extended position when the action of the shotgun is opened.

Abstract: A firearm for implementing an improved 9 mm cartridge is provided, wherein the improved 9 mm cartridge includes a 9 mm bullet associated with a 45-9 cartridge casing, wherein the 9 mm bullet weights at least 90 grains and wherein the 45-9 cartridge casing is configured to contain a propellant sufficient to propel the 9 mm bullet to a velocity of at least 1600 feet per second. The firearm may include a barrel, wherein the barrel is configured to operably interact with the 9 mm bullet and a chamber, wherein the chamber includes at least one chamber portion sized and shaped to operably associate with the 45-9 cartridge casing and a free-bore, wherein the free-bore includes at least one free-bore portion sized and shaped to operably associate with the 9 mm bullet.

Abstract: A caliber specific drill cartridge and an adaptor assembly for transforming the caliber specific drill cartridge for use in a first firearm chamber into a caliber specific drill cartridge assembly for use in a second firearm chamber. The adaptor assembly may include a drill cartridge having a first central axis, a rear casing, and a front casing with a first maximum outer dimension perpendicular to the first central axis. The front casing may be connected to the rear casing such that the front and rear casings cooperate to form a housing, which may be configured and dimensioned for chambering in a first firearm chamber. The adaptor assembly further may include a cartridge specific adaptor with a second central axis. The drill cartridge and the cartridge specific adaptor may be combined such that the adaptor assembly is configured and dimensioned for chambering in a second firearm chamber.

Abstract: A caliber specific drill cartridge and an adaptor assembly for transforming the caliber specific drill cartridge for use in a first firearm chamber into a caliber specific drill cartridge assembly for use in a second firearm chamber. The adaptor assembly may include a drill cartridge having a first central axis, a rear casing, and a front casing with a first maximum outer dimension perpendicular to the first central axis. The front casing may be connected to the rear casing such that the front and rear casings cooperate to form a housing, which may be configured and dimensioned for chambering in a first firearm chamber. The adaptor assembly further may include a cartridge specific adaptor with a second central axis. The drill cartridge and the cartridge specific adaptor may be combined such that the adaptor assembly is configured and dimensioned for chambering in a second firearm chamber.

Abstract: The invention relates to an arrangement for supporting a shell (1), such as a mortar shell, into the barrel of a breech-loading weapon, the arrangement comprising a support element (8) to be fastened to the tail of the mortar shell, the element comprising a rim flange (87), means for fastening the support element to the tail of the mortar shell (1), and firing means (9) for firing an actual primer (5) of the mortar shell (1) for firing the mortar shell. The arrangement is characterized in that the means for fastening the support element to the shell tail are arranged in the support element (8) by means of finger-like fastening members (80) settling onto the shell tail tube (3) and arranged to constitute an interference fit between the shell (1) and the support element (8) when the shell (1) is placed in the support element (8). The invention also relates to a support element and a method for supporting a mortar shell (1) into the barrel of a breechloading weapon.

Abstract: A caliber specific drill cartridge and an adaptor assembly for transforming the caliber specific drill cartridge for use in a first firearm chamber into a caliber specific drill cartridge assembly for use in a second firearm chamber. The adaptor assembly may include a drill cartridge having a first central axis, a rear casing, and a front casing with a first maximum outer dimension perpendicular to the first central axis. The front casing may be connected to the rear casing such that the front and rear casings cooperate to form a housing, which may be configured and dimensioned for chambering in a first firearm chamber. The adaptor assembly further may include a cartridge specific adaptor with a second central axis. The drill cartridge and the cartridge specific adaptor may be combined such that the adaptor assembly is configured and dimensioned for chambering in a second firearm chamber.

Abstract: A firearm for implementing an improved 9 mm cartridge is provided, wherein the improved 9 mm cartridge includes a 9 mm bullet associated with a 45-9 cartridge casing, wherein the 9 mm bullet weights at least 90 grains and wherein the 45-9 cartridge casing is configured to contain a propellant sufficient to propel the 9 mm bullet to a velocity of at least 1600 feet per second. The firearm may include a barrel, wherein the barrel is configured to operably interact with the 9 mm bullet and a chamber, wherein the chamber includes at least one chamber portion sized and shaped to operably associate with the 45-9 cartridge casing and a free-bore, wherein the free-bore includes at least one free-bore portion sized and shaped to operably associate with the 9 mm bullet.

Abstract: The present invention discloses a reduced energy training cartridge for use in a straight blowback operated firearm having a barrel with firing chamber, the cartridge comprising a cartridge case being defined by a rear portion with an external groove, a front portion having a velocity reduction structure and a wall with an outer surface and an inner surface, a sabot slideably engaged within the cartridge case, the sabot having a rear portion with an outside diameter substantially equal to the inside diameter of the inner surface of the cartridge case and which contains a gas sealing and braking structure and a primer disposed in the rear portion of the cartridge case where, upon percussion of the primer, the cartridge case rapidly slides relative to the sabot until such point when the velocity reduction structure of the cartridge case engages with the sealing and braking structure of the sabot, thereby stopping further movement of the cartridge case relative to the sabot, The present invention also contemplat

Abstract: A sabot-retaining shotshell cartridge and firing assembly including a barrel or barrel insert for firing the sabot-retaining shotshell cartridge. The shotshell cartridge includes a cylindrical hull, a sub-caliber projectile, a propellant charge, and a sabot. A central pathway or thin membrane is defined within the base of the sabot between the sub-caliber projectile and propellant charge. The barrel or barrel insert for firing the cartridge includes a transitional area between chamber and sub-caliber rifled bore to retain sabot in the cartridge. Upon cartridge firing, propellant gases flow through central portion of sabot base propelling projectile out of the sabot and into sub-caliber rifled bore.

Abstract: A two piece, two-stage, rechargeable, reusable, reduced-energy mechanically operating cartridge is provided for launching a bullet of various compositions from a dedicated or modified firearm. The cartridge unit is comprised of a primary case, a piston sleeve, a propellant unit, and a bullet choice of a solid light weight material for inanimate-target applications or a “marking” version for non-lethal live-target training applications. Cartridge includes a piston sleeve and a primary case coupled together via a channel and cog locking/traveling/unlocking system. The primary case includes a substantially non-deformable jacket defining a cavity to receive a propellant unit or propellant connection and provides the channels to receive piston sleeves cogs for a locking/traveling/unlocking feature. The piston sleeve includes a substantially non-deformable jacket defining a cavity to receive configured bullet.

Abstract: A two piece, two-stage, rechargeable, reusable, reduced-energy mechanically operating cartridge is provided for launching a bullet of various compositions from a dedicated or modified firearm. The cartridge unit is comprised of a primary case, a piston sleeve, a propellant unit, and a bullet choice of a solid light weight material for inanimate-target applications or a “marking” version for non-lethal live-target training applications. Cartridge includes a piston sleeve and a primary case coupled together via a channel and cog locking/traveling/unlocking system. The primary case includes a substantially non-deformable jacket defining a cavity to receive a propellant unit or propellant connection and provides the channels to receive piston sleeves cogs for a locking/traveling/unlocking feature. The piston sleeve includes a substantially non-deformable jacket defining a cavity to receive configured bullet.

Abstract: A non-lethal projectile carrier includes a base having a plurality of hinges, each hinge including a tab; and a payload case attached to the base, the payload case comprising a plurality of petaloid members, each petaloid member including an opening in a rear surface for insertion of a corresponding tab; wherein upon exiting a gun tube the petaloid members open and fold toward the base. Each petaloid member includes a lip on one edge and an undercut on another edge so that adjacent petaloid members form lap joints. The hinges are defined by zones of small cross-sectional area in the base.

Abstract: A sabot-retaining shotshell cartridge and firing assembly including a barrel or barrel insert for firing the sabot-retaining shotshell cartridge. The shotshell cartridge includes a cylindrical hull, a sub-caliber projectile, a propellant charge, and a sabot. A central pathway or thin membrane is defined within the base of the sabot between the sub-caliber projectile and propellant charge. The barrel or barrel insert for firing the cartridge includes a transitional area between chamber and sub-caliber rifled bore to retain sabot in the cartridge. Upon cartridge firing, propellant gases flow through central portion of sabot base propelling projectile out of the sabot and into sub-caliber rifled bore.

Abstract: A training mortar apparatus includes a small mortar tube and a large mortar tube, the small mortar tube being disposed in the large mortar tube; a removable base cap attached to one end of the small mortar tube; a plug inserted in the removable base cap; a removable firing pin inserted in the plug; a second base cap attached to one end of the large mortar tube; and at least one opening in the large mortar tube, the opening being axially aligned with the removable firing pin of the small mortar tube. Improved manufacturing methods are also disclosed.

Abstract: The present invention (2) is a small arms caliber and/or power reducing device for using a primer (18) to fire a projectile (21) and thence directionally guide the trajectory of said projectile from a firearm (1) the barrel bore of which may be substantially larger than the caliber of said projectile. The present invention may be adapted by selecting appropriate external dimensions, internal dimensions and form factors to enable its use with any existing breech loading small arm chambered for center-fire cartridge ammunition. The present invention may be constructed of two parts: 1) An adapter sleeve (10), and 2) a chamber (14), and intended to be re-loadable for multiple uses. Alternatively, the present invention may be configured as a single piece, fabricated with a primer and a projectile disposed therein, and intended to be used one time and discarded. Suitable primers may include Standard Small Rifle or Small Pistol Primers, Standard Large Rifle or Large Pistol Primers, or Standard 209A Shotgun Primers.

Abstract: A two piece, two-stage, rechargeable, reusable, reduced-energy mechanically operating cartridge is provided for launching a bullet of various compositions from a dedicated or modified firearm. The cartridge unit is comprised of a primary case, a piston sleeve, a propellant unit, and a bullet choice of a solid light weight material for inanimate-target applications or a “marking” version for non-lethal live-target training applications. Cartridge includes a piston sleeve and a primary case coupled together via a channel and cog locking/traveling/unlocking system. The primary case includes a substantially non-deformable jacket defining a cavity to receive a propellant unit or propellant connection and provides the channels to receive piston sleeves cogs for a locking/traveling/unlocking feature. The piston sleeve includes a substantially non-deformable jacket defining a cavity to receive configured bullet.

Abstract: A buckshot round for use in large, smooth-barreled weapons, such as an M203 or M79 grenade launcher, wherein the round itself acts as the firing barrel. In particular, a lethal buckshot round is provided, wherein an inner metal cylinder (barrel portion) is encased in an outer jacket, and a shot wad is contained in the inner metal cylinder, such that the inner metal cylinder acts as a barrel for firing of the buckshot from the smooth-barreled weapon. The barrel portion of the buckshot round acts as the firing barrel, and prevents contact of the buckshot with the weapon barrel during firing, thereby providing an accurate firing pattern and preventing damage to the weapon barrel.

Abstract: A shotgun adapter is provided for firing a shotgun cartridge having a shotgun bore which is larger than the cartridge. The adapter is a generally hollow tubular member having a cylindrical tapered outer wall and an inner wall concentric with the outer wall, with the inner wall being uniquely tapered to specified degrees depending on the shell gauge to be used.

Abstract: The invention provides a training cartridge (304) having a peripheral fire primer (306) and a gun modified to fire the cartridge. The combination of modified gun and peripheral fire cartridge avoids the potentially adverse consequences that could arise if live ammunition and training ammunition were to become inadvertently confused or mixed up by preventing the firing of live centre fire ammunition.

Abstract: A cartridge for use in non-lethal applications comprising an anterior portion and a posterior portion, the posterior portion comprising a recycling mechanism including a moveable member in the form of a piston or cylinder, slideably engaged respectively with a cylinder or a piston, gas generating means for providing gas within the cartridge, the gas generating means being initiatable by the primer on firing of the firearm to propel the moveable member in a rearward direction against the breech block so as to recycle the firearm, the anterior portion having a gas passage therethrough and being provided with a nose portion which is suitable for receiving a projectile; an expansion chamber being provided between the moveable member and the anterior portion, a source of energetic material located in the anterior portion forward of the gas channel, a percussion means of cross sectional dimension slightly smaller than the gas channel and moveable therein the energetic material being initiatable by a shock or pressu

Abstract: A shotgun adapter is provided for firing a shotgun cartridge having a shotgun bore which is larger than the cartridge. The adapter is a generally hollow tubular member having a cylindrical tapered outer wall and an inner wall concentric with the outer wall, with the inner wall being uniquely tapered to specified degrees depending on the shell gauge to be used.

Abstract: A cartridge for use in non-lethal applications comprising an anterior portion and a posterior portion, the posterior portion comprising a recycling mechanism including a moveable member in the form of a piston or cylinder, slideably engaged respectively with a cylinder or a piston, gas generating means for providing gas within the cartridge, the gas generating means being initiatable by the primer on firing of the firearm to propel the moveable member in a rearward direction against the breech block so as to recycle the firearm, the anterior portion having a gas passage therethrough and being provided with a nose portion which is suitable for receiving a projectile; an expansion chamber being provided between the moveable member and the anterior portion, a source of energetic material located in the anterior portion forward of the gas channel, a percussion means of cross sectional dimension slightly smaller than the gas channel and moveable therein the energetic material being initiatable by a shock or pressu

Abstract: A shotgun adapter is provided for firing a shotgun cartridge having a shotgun bore which is larger than the cartridge. The adapter is a generally hollow tubular member having a cylindrical outer wall and an inner wall concentric with the outer wall, with the inner wall and outer wall being uniquely tapered to specified degrees designed to improve the shooting accuracy when skeet shooting with different gauge cartridges.

Abstract: The invention provides a blank pyrotechnic cartridge comprising a cartridge casing having a bullet-like projection extending forwardly therefrom, the bullet-like projection being retractable through an opening in the casing when the cartridge is fired, the cartridge being axially expandable in a rearwards direction in use to move the breechblock of a firearm to recycle the firearm. Also provided is a method of feeding blank ammunition into the barrel of a gun comprising the step of loading the gun with a blank cartridge, the blank cartridge comprising a cartridge casing having a bullet-like projection extending forwardly therefrom, the bullet-like projection being retractable through an opening in the casing when the cartridge is fired, the cartridge being axially expandable in a rearwards direction in use to move a breechblock of the gun to recycle the gun.

Abstract: A cartridge for use in non-lethal applications comprising an anterior portion and a posterior portion. The posterior portion of the cartridge includes a recycling mechanism that is initiated by activating a first primer. The anterior portion of the cartridge includes a source of energetic material that is constructed to be initiated or activated by a reaction produced upon activation of the first primer to create an audible signal.

Abstract: A cartridge for use in non-lethal applications comprising an anterior portion and a posterior portion. The posterior portion includes a recycling mechanism, which can be initiated upon activation of a primer, and the anterior portion has a nose portion which is suitable for receiving a projectile. The cartridge also includes a source of energetic material which can be activated by the primer to cause propulsion of the projectile from the cartridge. The energetic material source is disposed toward the anterior end of the cartridge and can be conveniently initiated by the shock or pressure wave associated with propellant gases used to propel a moveable member against a breech block of a gun.

Abstract: This low impulse payload cartridge for automatic weapons includes a case, a piston, an ogive, a payload cup, a payload, and a link. The payload cup and payload is seated into the forward portion of the piston. Gas passages permit propellant gases to bleed into the cavity behind the payload and to accelerate the payload upon firing. An alternative to using bleed gases is to use a separate propelling charge behind the payload. The case and piston are assembled and telescopically secured by means of a crimp or other similar feature, to allow relative movement therebetween during chambering and firing. The link may be allowed to move for some portion of the required relative travel between the link and the base of the case. A shoulder on the piston provides a stop through which reaction loads are transmitted to the rear of the barrel during chambering and firing. The piston telescopes over the case during chambering to provide the relative movement between the link and the case base required for weapon function.

Abstract: A sub-caliber projectile cartridge for automatic weapons includes a case, a piston, a forward cavity/an inner bore in the piston, a sub-caliber projectile, and a link. The sub-caliber projectile is seated into the forward cavity/inner bore located in the forward portion of the piston. Gas passages permit propellant gases to bleed into the cavity behind the sub-caliber projectile and to accelerate the sub-caliber projectile upon firing. The case and piston are assembled and telescopically secured by means of a crimp or another similar feature, to allow relative movement therebetween during chambering and firing. The link may be allowed to move for some portion of the required relative travel between the link and the base of the case. A shoulder on the piston provides a stop through which reaction loads are transmitted to the rear of the barrel during chambering and firing.

Abstract: A low impulse telescoping cartridge includes a case, a piston, a projectile, and a link. The projectile is seated into the forward portion of the piston. Gas passages permit propellant gases to bleed into the cavity behind the projectile and to accelerate the projectile upon firing. An alternative to using bleed gases is to use a separate propelling charge behind the projectile. The case and piston are assembled and telescopically secured by means of a crimp or other similar feature, to allow relative movement therebetween during chambering and firing. The link may be allowed to move for some portion of the required relative travel between the link and the base of the case. A shoulder on the piston provide a stop through which reaction loads are transmitted to the rear of the barrel during chambering and firing. The piston telescopes over the case during chambering to provide the relative movement between the link and the case base required for weapon function.

Abstract: The invention relates to a training weapon system for a portable recoilless anti-armor weapon of the type which comprises a sub-caliber insert barrel (1) arranged in the bore of the launching barrel of the full-caliber weapon. In order to improve the accuracy of the system and make it more safe as well as less expensive when compared to previous systems of this type, the sub-caliber insert barrel (1) has a rifled bore to make the training projectile spin stabilized. The forward aligning member (5) for centering the insert barrel (1) is engaging the ridges of the rifles in the rifled portion of the barrel in the recoilless full caliber weapon. By such an arrangement it can be avoided that length tolerances give rise to undesired radical deviations which might result in a mis-alignment of the insert barrel (1) within the gun bore. This could happen with the forward aligning member engaging the conical, smooth-bored firing chamber in the barrel.

Abstract: An impulse generating tool for breaking up rock has a barrel, a breech body for a cartridge (50) loaded with gas producing propellant (70) and a firing mechanism for firing the cartridge. A hole is drilled in the rock and filled with water. The barrel is passed down the hole and the cartridge is fired. Shockwaves break up the rock. A firing pin (42) of the firing mechanism is off-set (56) from a centerline (54) of the breech body, and the cartridge, which is of a shotgun type, has a rim-fire percussion cap (63) complemental to the off-set of the firing pin. Conventional shotgun ammunition cannot be fired with the tool, and cartridges for the tool cannot be fired by a conventional shotgun.

Abstract: An impulse generating tool for breaking up rock has a barrel, a breech body for a cartridge (50) loaded with gas producing propellant (70) and a firing mechanism for firing the cartridge. A hole is drilled in the rock and filled with water. The barrel is passed down the hole and the cartridge is fired. Shockwaves break up the rock. A firing pin (42) of the firing mechanism is off-set (56) from a centreline (54) of the breech body, and the cartridge, which is of a shotgun type, has a rim-fire percussion cap (63) complemental to the off-set of the firing pin. Conventional shotgun ammunition cannot be fired with the tool, and cartridges for the tool cannot be fired by a conventional shotgun.

Abstract: A practice tear gas round comprises a projectile having the same caliber as the standard tear gas gun, and a main adapter which is separately loadable into the launcher and has an outside diameter of the same caliber as the launcher while providing a chamber of reduced diameter for use of the launcher with devices of smaller caliber than the launcher. Preferably, an auxiliary adapter is receivable within the chamber of the main adapter in order to further reduce the caliber of propelling charge which is to be used for the practice round, while allowing removal of the auxiliary adaptor in order to receive in the main adaptor a standard 12 gauge shot shell, for example, for use of the launcher as a single shot 12 gauge shot gun. Additionally, the standard gas gun can be converted to a single shot rifle or shot gun for firing various other smaller calibers of cartridges and/or shot shells according to the auxiliary adaptor selected and inserted into the main adaptor for reception of a cartridge or shot shell.

Abstract: Adapter for safely firing a shotgun cartridge in a shotgun of a gauge larger than said cartridge comprising a tubular member having internal dimensions of a size to accommodate and hold snugly a cartridge of the gauge desired to be shot and external dimensions of a size to be accommodated in the shell chamber a shotgun in which it is desired to fire said cartridge.

Abstract: The plug for shotgun or rifle barrel using black powder is outstanding in that it has a means (2) likely to extract the primer (a) destined to ignite the black powder contained in a chamber (c) of the said plug (1), when the arm is being opened.

Abstract: This relates to an inexpensive conversion kit for handguns wherein inexpensive small caliber shells may be fired from a large caliber handgun. The kit includes a special adapter shell which is formed of two separable housing members into which there is inserted a small caliber shell, for example a .22 caliber shell. This shell will generally be of the rim firing type, whereas the larger caliber shell of the handgun is normally of the center firing type. Accordingly, the adapter shell will also include a special rim firing, firing pin which will be activated by the conventional firing pin of the handgun. The kit further includes a special barrel which is readily mounted in the handgun as a replacement barrel and which has a breech for receiving only the adapter shell. The converted handgun will operate in the normal manner.

Abstract: The invention provides an electrical igniter for an adaptive cartridge of a subcaliber barrel system by which the firing pin extension (12) is arranged axially movable by means of a guide (13) made of an electrically non-conductive material. A slide valve (22) grips a safety rod (17) in the guide (13). The safety rod (17) is situated adjacent the breech mechanism (6) only such that the firing pin (12) borders on the percussion cap (29) of the cartridge (11). By an open breech mechanism (6) the safety rod (17), under spring tension, is moved in the direction of the cartridge (11) together with the firing pin (12).

Abstract: An adapter cartridge for insertion tube systems of firearms has a jacket casing which is made of fiber reinforced plastic that is joined securely to the cylindrical part of a tube base. The tube base has an incircling drawn shell rim that is securely enclosed by a plastic ring.

Abstract: A small arms caliber reducing adaptor kit including a barrel liner and cartridge insert sized to be inserted into an original small arms barrel and an original cartridge chamber respectively, the barrel liner and cartridge insert having corresponding reduced bores with the bore of the cartridge insert having a nose opening for a pellet and a base opening for a primer - the kit further including a primer seating tool.

Abstract: A shotshell cartridge adapter is disclosed that enables safe firing of subcaliber rim-fire shot cartridges in conventional shotguns. In the preferred embodiment, the invention comprises an outer hull shaped like a standard shotgun shell; an adapter tube fixed within the hull; and a cylindrical firing pin mechanism removably housed within the lower end of the tube. This firing pin mechanism has a recessed piston-shaped firing pin with a chisel-pointed protrusion that strikes a shot cartridge loaded in the adapter.

Abstract: A gauge adapter for a break-action shotgun, including a bullet barrel fixed in a plug having the dimensions of the shot cartridge. The adapter includes a resilient pressure device, disposed for pressing the plug solidly against the wall of the transition cone in the shot bore when the fire-arm is closed. The forward part of the plug has a rounded breast for bearing against the transition cone, the radius of the breast corresponding to the cylindrical radius of the plug. The breast thus acts in the transition cone as the ball in a ball joint. The resilient pressure device can be an elastomeric pressure pad disposed in a practically cylindrical cavity in the rear face of the plug. The pressure pad is outwardly covered by a plate extending up to half the bullet barrel and has a cut-out for the bullet cartridge. In the area of the cartridge rim, the plate has a depression for engaging under the rim of the cartridge.

Abstract: An arrangement for gastightly sealing the gap between the cartridge chamber and the bottom of an insert which is received in a gun barrel 1 to be able to fire cartridges of a smaller caliber. The gastightness is obtained substantially by providing that the neck of the subcaliber cartridge case inserted in the cartridge chamber protrudes into the bottom of the barrel insert and that the outer surface of the neck snugly fits the cylindrical surface of the insert.

Abstract: An adaptation cartridge comprises a firing pin casing which is screwed into a cartridge chamber or cartridge chamber tube and is secured against rotation by a radially displaceable slide. The cartridge is used for training on a gun having a subcaliber barrel adapter.