Abstract: The barrel of a pistol, specifically in a short recoil operated pistol, is comprised of multiple bearings surfaces comprised of cams and lugs that allow the pistol to function. The surfaces mechanically delay the pistol enough to allow the pistol to reliably function in the manner of an automatic firearm, chambering a round at the end of each cycle of operation. A barrel that locates a forward lug positioned horizontally in front of the trigger guard of the pistol with side cams that are shallow and interact in a way to provide the pistol with a robust and consistent lock up from shot to shot to provide an advantage in the function of the firearm.

Abstract: A barrel assembly for use in a semiautomatic firearm, including a barrel and a takedown lever. A rear portion of the barrel includes a follower lug and a rear lug extending from an underside of the rear portion. The follower lug further includes a follower notch. A pin of the takedown lever includes a notch with a vertical face configured to contact a vertical face of the follower notch when the firearm is in the locked position. The rear lug is configured to be supported by a portion of a locking block of the firearm prior to firing and during a portion of the recoil period. The modifications to the barrel assembly result in increased dwell time and accuracy of the firearm.

Abstract: A semi-automatic pistol has a frame having a trigger guard defining a trigger finger space, a barrel connected to the frame and defining a bore axis, a slide connected to the frame and operable to reciprocate along the bore axis between a forward battery position and a rearward open position, a recoil mechanism operably connected between the slide and the frame, and operable to bias the slide to the battery position, and the recoil mechanism being entirely below the barrel axis and forward of the trigger finger space. The recoil mechanism may be a recoil spring defining a spring axis. The spring axis may be parallel to the bore axis. The recoil spring may be a helical shape defining a bore receiving a guide rod. The guide rod may be below the barrel. The trigger guard may have a downwardly facing upper surface defining the trigger finger space.

Abstract: A suppressed pistol has a breech block and a slide mounted on a frame. The breech block and slide are separate pieces, movable relatively to one another and the frame. A link extends between the breech block and the frame. The link carries a cam and a cam follower. The cam follower on the link engages a cam on the frame, the cam on the link engages a cam follower on the slide. Action between the cams, cam followers and the link causes separation between the breech block and the slide during operation of the pistol. The suppressor includes a container having baffle plates with truncated cones defining openings offset from the geometric centers of the baffle plates.

Abstract: A hammer strut support (150, 156, 160, 162, 166) in a firearm which supports or aligns a free end (134) of a pivotally mounted hammer strut (116), and physically blocks it from becoming lodged in a position, typically under a crosspin (120) such as a sear spring stop pin, that would preclude subsequent proper reassembly of firearm, unless un-lodged and properly repositioned. It is sandwiched in, and may also envelop, firearm structure. Upper surface (154) of hammer strut support may also have a guide channel (164) to align hammer strut (116).

Abstract: The present invention relates to a gun (1) with a barrel (4) which proximally delimits a firing chamber (6), and a slide (8) translatable between a forward configuration in which it closes the firing chamber (6), and a rearward configuration in which it is distanced from the barrel (4) to open said chamber (6). The orientation of the firing chamber (6) in the forward configuration and in the rearward configuration is substantially parallel to the longitudinal axis (X). The gun (1) further comprises a locking device (10), which in the forward configuration acts so as to join the barrel (4) and the slide (8) and in the rearward configuration releases the slide (8) to enable its backward movement. The locking device (10) comprises at least one locking projection (12, 14) which, when the slide (8) and the barrel (4) are reciprocally released, guides the slide (8) in translation.

Abstract: A barrel for a semiautomatic firearm operating under the short recoil system has one or more cam followers projecting outwardly to engage one or more cams positioned on an inner surface of a slide surrounding the barrel. Interaction between the cams and the cam followers controls the angle between the longitudinal axis of the barrel and the axis of motion of the slide to prevent the breech end of the barrel from moving too far as the barrel tilts as it unlocks from the slide, ensuring that the extractor will engage the rim of a spent casing and extract it from the chamber during recoil.

Abstract: A barrel for a semiautomatic firearm operating under the short recoil system has one or more cam followers projecting outwardly to engage one or more cams positioned on an inner surface of a slide surrounding the barrel. Interaction between the cams and the cam followers controls the angle between the longitudinal axis of the barrel and the axis of motion of the slide to prevent the breech end of the barrel from moving too far as the barrel tilts as it unlocks from the slide, ensuring that the extractor will engage the rim of a spent casing and extract it from the chamber during recoil.

Abstract: A semi-automatic pistol is provided having a barrel, a frame and a slide. The slide is adapted for linear motion along the frame during a firing sequence and has a forward end and a block end. The forward end has an upper cam follower surface and a lower cam follower surface on the inside surface adjacent to the barrel. The barrel has a ramp cam surface adjacent to the chamber end of the barrel to effect locking and unlocking of the barrel relative to the slide during the firing sequence, a bottom cam surface and a top cam surface. The bottom cam surface and the top cam surface extend from the front end toward the chamber end of the barrel and each have undulating surfaces that moves against the lower cam follower surfaces of the slide to cause oscillation of the barrel while the slide moves during the firing sequence.

Abstract: A semi-automatic pistol is provided having a barrel, a frame and a slide. The slide is adapted for linear motion along the frame during a firing sequence and has a forward end and a block end. The forward end has an upper cam follower surface and a lower cam follower surface on the inside surface adjacent to the barrel. The barrel has a ramp cam surface adjacent to the chamber end of the barrel to effect locking and unlocking of the barrel relative to the slide during the firing sequence, a bottom cam surface and a top cam surface. The bottom cam surface and the top cam surface extend from the front end toward the chamber end of the barrel and each have undulating surfaces that moves against the lower cam follower surfaces of the slide to cause oscillation of the barrel while the slide moves during the firing sequence.

Abstract: 1911-100 linkless barrel system is modified drop in barrel and spring guide assembly for colt 1911 style pistol platform. It uses angled teeth machined in to the lower barrel lug and in the groove of recoil spring guide assy to lock and unlock the barrel from slide in pistol cycling process. This improves consistency, longetivity, strength, accuracy and simplicity in colt 1911 style pistols. As drop in barrel system 1911-100 can be installed in a brand new or any already produced colt 1911 pistol, which gives it very big marketability potential.

Abstract: A firearm such as a pistol includes a barrel which rotates and travels linearly relative to a frame of the pistol and a slide which travels linearly relative to the barrel and frame. The barrel has at least one stop located at a muzzle end for engaging at least one stop on the slide when the barrel is in a first rotational position to prevent linear movement of the slide relative to the barrel, which stops permit the slide and said barrel to move linearly relative to one another when the barrel is in a second rotational position. Another aspect of the invention comprises a control surface which is located on a barrel of a firearm. Yet another aspect of the invention comprises such features associated with a rotating, rather than tipping, firearm barrel. Yet another aspect of the invention comprises a replaceable energy buffer for a firearm.

Abstract: An improved barrel link for consistently and reliably placing a barrel of a semi-automatic pistol into battery is disclosed. One embodiment of the present invention extends the width of the barrel link beyond that of the receiving channel of the barrel lug legs so as to substantially equal the exterior dimension of the barrel lug. In addition, the portions of the barrel link extending beyond the width of the channel of the barrel lug are designed to provide multiple points of contact with the front face of the barrel lug in both vertical and horizontal positions so as to reliably and consistently place the barrel into battery. The additional width of the barrel link and additional contact between the link and barrel lug aids in stabilizing lateral and rotational forces prolonging the life of the weapon.

Abstract: An improved barrel link for consistently and reliably placing a barrel of a semi-automatic pistol into battery is disclosed. One embodiment of the present invention extends the width of the barrel link beyond that of the receiving channel of the barrel lug legs so as to substantially equal the exterior dimension of the barrel lug. In addition, the portions of the barrel link extending beyond the width of the channel of the barrel lug are designed to provide multiple points of contact with the front face of the barrel lug in both vertical and horizontal positions so as to reliably and consistently place the barrel into battery. The additional width of the barrel link and additional contact between the link and barrel lug aids in stabilizing lateral and rotational forces prolonging the life of the weapon.

Abstract: A semiautomatic handgun has a frame, a barrel mounted on the frame and having a chamber for receiving a cartridge, a slide mounted on the frame and over the barrel and longitudinally movable relative to the frame and the barrel, a firing mechanism for striking the cartridge, and a trigger for releasing the firing mechanism. The barrel has a peripheral wall portion extending from the chamber, a cylindrical portion forming a front terminal end of the barrel, and a conical portion disposed between and contiguous with each of the peripheral wall portion and the cylindrical portion.

Abstract: A semiautomatic handgun having multiple safeties includes a body made in two halves and a slide which can move lengthwise on a pair of rails. The hammer is cocked by rearward movement of the slide. The trigger, which has purely translation motion, is blocked from behind except when the user is wearing a special magnetic ring on his trigger finger. A decocker mechanism pushes the firing pin forward and slides the sear back, and prevents release of the hammer until the firing pin is blocked. The firing pin is normally blocked by a cup, which prevents the firing pin from moving forward if the gun is dropped. The cup is moved to an inactive position by a release lever only when the trigger is pulled. A safety lock, which is preferably operated by a special tool, prevents the transfer bar from moving. The firing pin block lever is locked in a downward position when the safety is activated. A hammer block bar prevents the hammer from moving when the safety is on.

Abstract: An automatic pistol converted to fire low energy ammunition in a blow-back mode has a replacement barrel that carries a cam on its upper surface. The weapon slide, as it retires during firing, contacts the cam and rotates the chamber end of the replacement barrel downwardly. This aligns the spent casing for ejection by the ejector, once extracted from the chamber. The slide may carry a removable deflector plate for contacting the cam.

Abstract: This invention concerns a closing device for the barrel in semiautomatic and automatic pistols. The barrel (22) is equipped, in its lower rear part, with first lateral means (31) for interacting with the first complementary devices (28) at the sides of the breech-block (21) to hold the barrel closed when the breech-block is in the forward position, and with second means (32) designed to interact with the second complementary means (25) on an element (23) of the stock, for swinging the rear part of the barrel downward and the blocking of the barrel in order to open the gun when the breech-block is moved into the rear position.

Abstract: A barrel bushing for a semi-automatic pistol. The barrel bushing defines a bore for receiving a barrel therein for reciprocating movement during operation of the pistol. The improvement to the barrel bushing comprises first, second and third annular bearing surfaces formed on inner walls of the bore and against which the barrel moves during operation of the pistol. The first bearing surface contacts and supports the barrel during the recoil phase of operation, and defines a plane parallel to the longitudinal axis of the barrel during recoil. The second and third bearing surfaces reside in axially spaced-apart relation on opposite axially-extending sides of the first bearing surface and define respective planes with respect to the first bearing surface which are parallel to the longitudinal axis of the barrel during lockup and on which opposite upper and lower surfaces of the barrel are supported during lockup. A method of manufacturing the barrel bushing is also disclosed.

Abstract: A training barrel for conversion of a firearm from normal barrel/slide partial locking operation to unlocked slide blow-back operation has an insert which provides a guide ramp for chambering rounds during the reload cycle. The guide ramp compensates for the absence of rearward displacement of the barrel when the firearm is converted to a training configuration. Such insert may be assembled into the weapon without modification to the slide or frame of said weapon.

Abstract: The invention provides an apparatus for reducing recoil on a firearm or gun and to increase rate of firing. The invention uses a dual mass system to dynamically balance the gun wherein some of the energy of firing is absorbed within springs and thereby reduces the recoil force imparted to the gun user. The apparatus also comprises an ejector mechanism for ejecting a spent round and reloading a new round from the gun magazine with increased speed over conventional designs. The apparatus is applicable to automatic and semiautomatic handguns as well as rifles and machine guns.

Abstract: A drop-in barrel is provided that utilizes an extended locking recess and a spring clip retained within the locking recess to reduce the engagement tolerance between the slide and barrel of a recoil pistol, thereby achieving the performance necessary for competitive shooting.

Abstract: This invention discloses a semi-automatic pistol including a frame having a chamber for loading a cartridge, a barrel through which cartridges are fired, a slide normally in a forward position on the frame but movable rearwardly of the frame by the recoil produced by a fired cartridge, and a recoil spring normally coupled to the slide so as to be stressed by the rearward movement of the slide, and thereafter to relax to return the slide to its normal forward position and to load another cartridge into the chamber; characterized in that the pistol further includes a manually movable decoupling assembly which is manually movable from a coupling position, coupling the recoil spring to the slide, to a decoupling position decoupling the recoil spring from the slide and permitting the slide to be manually moved rearwardly of the frame and then to be returned to its normal forward position for loading a cartridge into the chamber.

Abstract: A precision device for semiautomatic handguns, of the type that includes a single block barrel and recoil obturator carriage (11,12), where the barrel is susceptible to axial movement relative to the obturator carriage. On a cylindrical section (16) of the barrel, an alignment bush (17) is mounted, with a biconical external surface that has a first conical part (17') designed to fit in a conical hole (13) in the obturator carriage; and a second conical part (17"), of the opposite conical shape, designed to protrude forwards from the obturator carriage and be used with a blocking nut (18).

Abstract: An improved non-tilt barrel for converting a conventional semi-automatic weapon from having a pivoting linkage between the barrel and the receiver to a weapon having a cam in order to reduce the recoil of the weapon and to increase the accuracy of the weapon. Further, the non-tilt barrel is provided for increasing the distance of travel of the barrel during recoil to, in turn, increase the time of lockup between the barrel and the slide during the firing of a cartridge. As a result of the modifications resulting in the non-tilt barrel, internal pressures are reduced during the unlocking of the barrel and slide, thereby accomplishing a longer life for each component, and especially the recoil buffer pad. The position of the slide stop on a conventional firearm is moved slightly up and toward the rear of the gun. The length of the slide stop lever is varied accordingly such that engagement with the slide stop plunger is maintained in conventional fashion.

Abstract: In a barrel of a semi-automatic pistol, the barrel having fore and aft barrel locking grooves for locking into corresponding fore and aft slide assembly wall segments formed in a slide mounted on a receiver of the pistol when the barrel is in its lock-up position, the improvement comprising adjustment means for precision-fitting the barrel to the dimensions and tolerances of the slide and the receiver of the pistol. The barrel includes a pair of raised contact pads integrally-formed in laterally-spaced relation in the aft locking groove of the barrel to provide an initial vertical interference fit between the aft locking groove of the barrel and the aft locking wall segment of the slide.

Abstract: A self-loading firearm operating on the short-recoil principle which comprises a frame having a handgrip and adapted to receive a magazine. A breech block slide is mounted for alternating longitudinal movement along the frame. A barrel is provided which is able to move rearwards while positively locked with the slide member by locking means. An actuating means disengages the barrel from the slide after the high pressure period has passed. A variable volume chamber means is fixed to the underside of the barrel which communicates with the barrel bore via a passage to receive pressurized gases upon firing. The action of the variable volume chamber means retards the motion of the barrel and slide assembly allowing a lighter slide to be used for a specific cartridge type.

Abstract: A semi-automatic breech locking pistol having a frame and an operating slide supported for reciprocal movement on the frame between battery and retired positions. An extractor supported for limited pivotal and lateral movement relative to the slide cooperates with an ejector mounted in fixed position on the frame. An abutment on the slide limits pivotal movement of the extractor to positively secure the extractor in engagement with the rim of an associated cartridge within the cannelure of the cartridge during the extracting portion of the pistol operating cycle. The extractor is free to move laterally of the operating slide when the breech is closed on a chambered cartridge to enable the extractor to engage and grip the rim of the chambered cartridge.

Abstract: An automatic pistol adapted to repetitively fire blank ammunition includes a frame, a barrel unit supported by the frame and a slide unit reciprocally mounted on the frame between the forward and rear position. The barrel unit and/or frame incorporate structure which enables the pistol to operate in a highly reliable, repetitive manner without visible alteration to the pistol. A method for forming a blank firing pistol is also disclosed.

Abstract: An automatic pistol, with at least a barrel (1) and a slide (2) that move relative to the rest of the firearm and to each other, whereby the barrel extends through an alignment channel (3) in the slide. The weapon included means (4) of centering the barrel around at least one axis through the slide such that the barrel will not jam. The means are elastic and resilient and rest lightly against the inner surface of the channel before the weapon is discharged.

Abstract: The invention discloses a hand-held firearm with a barrel assembly (2, 18, 36, & 54) moving back and forth essentially in or opposite the direction the weapon is fired in between a forward and a rear stop (44, 48, & 50) on or in a frame or grip assembly (12). A breech assembly (6 & 32) that moves back and forth essentially in the same direction as the barrel assembly between a forward and closed position and a rear and open position, moving out of the closed position and into the open position against the force of a closure spring (16) and, at the end of its return stroke, the frame or grip assembly or a component (64 or 64') resting off it. A buffering spring (66) tensions the barrel assembly toward the forward stop (44 or 50) and buffers its contact with the rear stop (44 or 48).

Abstract: A firearm for firing cartridges (2) which may in at least one embodiment fire caseless cartridges (2), having a barrel (1) pivoting around a pivot point (11) from a firing position to a loading position, and back to the firing position. A fixed wall (16) is positioned behind chamber (19) when barrel (1) is in the firing position, which absorbs the recoil of a fired cartridge (2). A plug (6) may be used to seal chamber (19) when firing caseless cartridges (2). The pivoting movement of barrel (1) may be activated against spring (4) by gas pressure from a fired cartridge (2) escaping from a hole (3) in barrel (1). Residual gas in barrel (1) may be used to move rammer (7) against spring (8) and rammer (7) then chambers a cartridge (2). Barrel (1) then returns to the firing position.

Abstract: The present invention pertains to a precision mechanism for guns, in which the barrel of the gun has a threaded end section and a cylindrical section on the outside, and in which an alignment bushing, which has an outer conical surface with a conicity corresponding to the conicity of the conical hole in the breech-block carriage, is mounted on the cylindrical section, and an adjustment ring intended for resting against the alignment bushing and the breechblock carriage and a threaded locking ring of the said striking ring are screwed onto the said threaded section.

Abstract: An automatic pistol for repetitively firing blank ammunition includes a frame, a barrel unit including a barrel chamber portion and a barrel element extending from the barrel chamber portion, and a slide mounted on the frame and reciprocally longitudinally moveable relative to the frame between a forward battery position where the pistol is capable of firing and a rearward position where a spent blank cartridge is ejected. The slide is initially freely moveable relative to the barrel unit to an engaging position of the slide displaced from the forward battery position. At the engaging position, the slide engaes an abutment surface of the barrel unit thereby moving the barrel unit to a position where the barrel chamber portion receives a blank cartridge. A mechanism, e.g., a restrictor element, may be provided for generating sufficient back pressure in the barrel unit upon firing of a blank cartridge to move the slide to the rearward position.

Abstract: A firearm has a frame, a magazine fitted in the frame and holding a plurality of cartridges including a top cartridge, a slide displaceable longitudinally on the frame above the magazine and its top cartridge along a longitudinal slide axis between a front position and a rear position, and a barrel centered on a barrel axis, displaceable longitudinally on the frame between respective front and rear positions, and having a rear end formed with a rearwardly open cartridge-receiving firing chamber. Pivot structure engaged between the barrel and the frame pivots the barrel on the frame between a firing position with the barrel axis substantially parallel to the slide axis and with the firing chamber transversely offset above the top cartridge and a loading position with the barrel axis forming an acute angle with the slide axis and with the firing chamber aligned longitudinally with and open downwardly toward the top cartridge.

Abstract: A firearm having a moveable breech locking barrel supported on a receiver by an offset barrel cam lug which cooperates with a wall of the receiver to provide space between the lug and the receiver wall to receive therebetween portions of a trigger and an associated trigger bar when the barrel moves to an unlocked position.

Abstract: A cartridge soft feed mechanism for presenting the cartridge to the chamber of a gun in such a way that the axis of the cartridge experiences no lateral or angular movement during chambering. The cartridge is telescoped into the chamber without ramping, reducing the probability of damage to the cartridge and reducing the chance of a chambering stoppage. The barrel is moved to a position and at such an angle during chambering that the cartridge is moved directly forward into the chamber, and then the barrel with the cartridge is moved into alignment with the moveable bolt for firing.

Abstract: Locked automatic pistol in connection with which the recoil-produced delivery of momentum of the barrel (2) is buffered.

Abstract: A safety stop for small arms having a slide, which keeps a catastrophic fure of the slide from causing shooter injury is disclosed. An improvement in the ejector and slide permit them to function together as a safety stop to prevent a broken slide from continuing off the back of the receiver in the event of catastrophic failure of the slide. A widened section on the ejector is accommodated in the ejector slot of the slide during normal firing of the weapon. An internal shoulder fixed relative to the slide and projecting into the ejector slot near the front of the slot is provided. Upon catastrophic slide failure during firing, the rear portion of the slide travels beyond its normally most rearward position and the internal shoulder engages the widened section of the ejector, stopping the rearward motion of the slide and precluding injury to the shooter.

Abstract: A group of upwardly directed ports disposed in a barrel of a hand held firearm intermediate the chamber and the muzzle of the firearm vent propellant gasses upwardly upon discharge of the firearm to produce a downwardly directed component of thrust to counteract gun rise and muzzle jump. Preferably, the center of the group of ports is in the vicinity of midway between the chamber and the muzzle. The ports may be straight or tapered passages or they may be nozzles.

Abstract: The safety of semi-automatic pistols and like firearms is improved by making them double action only combined with novel features that include use of roller bearings for support of trigger and sear assemblies, structuring them for constant pressure trigger pull, automatic blocking the firing pin from reaching the cartridge until the firearm is fully locked in the battery position and structuring operation of the sear so it can engage the firing pin only when the trigger pulls it rearward.

Abstract: The safety of semi-automatic pistols and like firearms is improved by making them double action only combined with novel features that include use of roller bearings for support of trigger and sear assemblies, structuring them for constant pressure trigger pull, automatic blocking the firing pin from reaching the cartridge until the firearm is fully locked in the battery position and structuring operation of the sear so it can engage the firing pin only when the trigger pulls it rearward.

Abstract: The invention relates to a device opening and closing the bolt of semiautomatic pistols with a barrel which is rotating and axially displaceable in the stock and interacting with the bolt in such a way that during the first section of the back motion barrel and bolt are integral and without a relative motion, while in the second section the barrel rotates in respect to the bolt but is still following its linear movement till the barrel stops and the bolt moves back for the actual opening of the arm.

Abstract: A locking assembly for weapon barrels comprises a slide including lugs removably engaging with grooves formed on the barrel which is associated with the weapon frame by means of a coupling rod in turn coupled to the weapon frame and barrel through coupling members suitable to cause the barrel to translate and turn for disengaging from the weapon frame.

Abstract: A pistol includes a barrel for holding a cartridge. A breech is movably mounted on a grip piece and movable relative to the barrel. The breech has opposed first and second claws resiliently biased for supporting a cartridge base. An ejector is received by the breech so that in response to movement of the breech relative to the barrel, the second claw slides from the cartridge base and the first claw engages the cartridge base for pivoting the cartridge for ejection from the barrel. An interchangeable barrel release mechanism lowers an end of the barrel in response to rearward movement of the breech relative to the barrel.

Abstract: An accurizer is provided for improving the accuracy of handguns by eliminating or lessening the potential misalignment of the barrel from which a projectile is fired and the sights used by the operator to aim at the target. There is provided a barrel having a modified area having an outside surface machined down and threaded. There is further provided a bushing having an outside tapered surface and inside threaded surface. A slide is provided having an inside surface tapered to fit the bushing.

Abstract: A fireman having a recoil spring, a recoil spring plug and a barrel bushing for directing and transferring recoil forces from a slide to a slide-supporting receiver of the firearm utilizes a lockplate inserted transversely through the slide and interposed between the barrel bushing and the recoil spring plug. The lockplate maintains the recoil spring plug and barrel bushing within the slide and allows transference of recoil forces from the slide to the recoil spring. The slide defines a through-aperture and both the barrel bushing and the recoil spring plug define a slot positionable in registry with the slide through-aperture so as to define an opening extending transversely through the firearm. The recoil spring plug is movable forwardly and rearwardly to a limited extent relative to the slide, and when the recoil spring plug is depressed in its rearward position and the barrel bushing is rotated into appropriate registry with the slide, the lockplate is insertable through the defined through-opening.

Abstract: An improved breech lock adapted for locking the barrel and slide of a handgun together to provide for improved securement between these parts. Typically, the firearm is of the type having a slide and a relatively movable barrel along with a handgrip and trigger. The rear part of the barrel has an end configuration or conformation which cooperates with an opening or recess in the upper part of the slide. In the preferred form, the barrel has an end conformation, the forward part of which is shaped as a point configured to be received snugly in a V-shaped opening in the forward end of the recess in the slide. The breech lock provides for locking as between the slide and the barrel, preventing relative forward movement of the barrel with respect to the slide and further locking with respect to relative lateral movement as between the parts or vibration which could effect the accuracy of the firearm.

Abstract: An accessory for a self-loading fire arm having a main recoil spring, which accessory comprises a secondary buffer arrangement for absorbing forces in the fire arm which result from firing a shot and which are not absorbed by the main recoil spring, and the secondary buffer arrangement having a guide portion for guiding the main recoil spring.

Abstract: A recoil operated hand gun has a main frame (1) constructed from a plurality of releasably interconnected parts (2, 3, 4, 5, 6, 7), a barrel assembly (38), a slide (37) movable relative to the main frame and including a releasably secured breech block (42), a recoil spring (51), a hammer assembly (8, 11, 13, 24, 25) and trigger assembly (28, 30, 31). The barrel assembly and slide are locked together by cooperating cams (39, 7) on the barrel assembly and the main frame which force a wedge cam locking surface (55) on the barrel assembly into engagement with an opening (56) in the slide on the slide's return to its position of rest.