Abstract: A magazine ejector device that attaches to an automatic firearm is provided herein. One magazine ejection device includes a housing configured to at least partially surround a magazine locking lever on an automatic firearm. The housing includes a forward surface configured to press against a portion of a magazine during unlocking and cause a downward force on the magazine such that the magazine ejects from the firearm.

Abstract: A link for a toy ammunition chain made up of a plurality of links hinged together side-by-side in articulated fashion includes a cylindrical body adapted to receive a soft projectile. A first hinge component extends laterally from the body and has a pair of hinge pins. A second hinge component extends laterally from the body at a position opposite the first hinge component and has a pair of recesses each for pivotally receiving a hinge pin of an adjacent link in the chain.

Abstract: A combination magazine and outer skin for a firearm including a magazine core adapted to releasably engage a firearm in communication with an action assembly associated with the firearm. Multiple cores are stackable end-to-end to define a continuous interior, with an end cap engaging an open bottom of a lowermost core. A design indicia exhibits an interior recess and is assembled around the stacked cores. A dual use follower is in use with an uppermost located magazine and maintains the assembly bolt in an open position and following the last cartridge being fired until such time as the magazine is removed. In the further variant, with a BHOA installed in place, the follower activates the BHOA and the bolt to remain in the retracted/open position, following magazine removal.

Abstract: The present invention relates to a magazine for a hand firearm, which is detachably mountable to the weapon, incorporating a drum-like, approximately cylindrical housing (10) which accommodates a greater number of cartridges in an orientation parallel to the axis of the housing, further incorporating an approximately spiral-shaped divider device (9), which is located inside the housing and accommodates the cartridges, a driver plate (14), which is adapted for indexed rotation about its axis and is driven by the force of a spring, said driver plate causing the cartridges to advance to the next position on a spiral path after each shot, and a follower (18) disposed in said magazine, which causes the cartridges to advance on their spiral path, to exit said divider device and to enter into a magazine head (21).

Abstract: A dynamic latch to selectively retain a magazine within the magazine port of a long gun. The dynamic latch permits the magazine to be inserted into the magazine port by movement in a single direction eliminating the need to rotate the magazine in order to secure it within the magazine port. The dynamic latch may include an outer housing, a piston positioned within the housing, and a spring positioned between the outer housing and the piston. A latch profile on the end of the piston may extend out of an opening in the end of a magazine well when the spring is in an uncompressed state.

Abstract: A sock secured to an exposed end of an ammunition holding magazine associated with a projectile firing device. The sock includes a heavy duty and frictionally engaging curtain shaped body, such as constructed of a heavy duty silicone. An integrally formed lanyard loop extends from the body, this enabling easy single finger engagement for accomplishing easy and efficient withdrawal of the magazine from a projectile firing device, easy storage and ease of transport.

Abstract: A sock secured to an exposed end of an ammunition holding magazine associated with a projectile firing device. The sock includes a heavy duty and frictionally engaging curtain shaped body, such as constructed of a heavy duty silicone. An integrally formed lanyard loop extends from the body, this enabling easy single finger engagement for accomplishing easy and efficient withdrawal of the magazine from a projectile firing device, easy storage and ease of transport.

Abstract: A finger tang incorporated into the bottom of a pistol grip allowing the ring finger and little finger of a shooter's hand to exert pressure on the tang, allowing increased stability, handling and therefore accuracy.

Abstract: The present invention relates to a magazine (10) for a handheld firearm, suitable for accommodating a plurality of cartridges (11, 12, 13, 14) which are transported in a guided movement by means of a feed within the magazine in the direction of the barrel of a weapon, in order to be loaded individually in each case into the barrel of the weapon at the upper end of the magazine after each shot, with the cartridges being guided along a curved path in the magazine.

Abstract: An improved magazine follower for use in existing magazines such as a 30 round magazine comprises a follower plate, a base plate, and a spring. The follower plate comprises a top plate, a convex follower leg, and a concave follower leg. The external shapes of the top plate, the convex follower leg, and the concave follower leg mirror the interior profile of the magazine, constraining the motion of the follower plate to a well-defined path within the magazine. The method of attaching the spring to the follower plate and the base plate in addition to the shape of the spring keeps the spring from “wobbling” or moving off a vertical axis of the spring as rounds of ammunition are loaded or dispensed. Consequently, the present system reduces binding or jams within the magazine, improving performance and life of the magazine follower.

Abstract: A follower for a firearm magazine includes a base part, a guide, a cartridge engaging part, and a slide stop actuating structure. The base part provides a lower surface against which the magazine spring acts, and the guide provides a guide surface extending transverse to a base plane defined by the base part. The cartridge engaging part provides a spring action within the follower itself to augment the force of the magazine spring. The slide stop actuating structure is located at a front end of the base part and provides an inclined engagement surface that extends upwardly from the front end of the base part to a front edge of the follower. This upwardly angled surface forms an engagement surface to reliably engage a slide stop lug of a firearm to actuate the firearm's slide lock mechanism when the magazine is empty.

Abstract: An apparatus for detachably joining together a plurality of individual ammunition magazines to form a multiple magazine assembly in which the individual magazines are alternately insertable into the firearm. The apparatus includes a connector block with outwardly-directed mounting faces having locating features that form a sliding engagement with recesses in the bases of the magazines. A coupling piece mounts to an end of the connector block and includes projecting tab portions that enter cooperating recesses in the forward sides of the magazine so as to hold the magazines in place on the mounting faces of the connector block. An adjuster screw can be loosened to withdraw the retaining tabs so that the individual magazines can be placed or removed from the mounting faces of the connector block, and then tightened to hold the magazines firmly against the connector block to complete the assembly. The connector block may be triangular with mounting faces for three magazines.

Abstract: A universal magazine release mechanism for firearms has a frame defining a cartridge magazine chamber receiving a cartridge magazine and having a magazine release receptacle intersecting the cartridge magazine chamber. A magazine release member is mounted within the magazine release receptacle and has linear movement to a magazine retaining position and a magazine release position. A spring urges the magazine release member toward the magazine retaining position. A magazine release button extends from the magazine release member and is exposed externally of the firearm frame for engagement and linear movement by the thumb of a user's hand. The magazine release member is selectively positioned to locate the magazine release button for thumb actuation by a right-handed user or a left-handed user.

Abstract: An attachable storage receptacle for storing an accessory on a firearm comprises a storage receptacle body having a top portion, a bottom portion and a wall portion, and an attaching mechanism on the top portion of the storage receptacle body for releasably attaching the storage receptacle body to a bottom end of a firearm magazine. The wall portion is connected to the top portion at one end and the bottom portion at the other end, thereby forming a hollow inner portion for storing the accessory in the storage receptacle.

Abstract: A magazine has a magazine body provided with a rotary clip, and the magazine body comprises an ejector member capable of movement, an ejector elastic member provided on the ejector member and being capable of expansion and contraction, and an engagement indent section capable of being engaged with a magazine catch at the time of loading the magazine into the air gun body, and the air gun body has a magazine ejector structure with the magazine catch that is urged by a catch elastic member to the magazine holding section and capable of engaging with the engagement indent section of the magazine, and a stopper that is capable of pressing part of the ejector member.

Abstract: A floorplate for a handgun magazine is used for the breakage of glass panes and is manufactured so that it fits all types of handgun magazines without disrupting the overall function of either the magazine or the handgun. The floorplate has a hole in which a pin is incorporated. The floorplate, when placed on the magazine of the handgun, allows the magazine to be also used as a hand tool for the breakage of glass panes. Additionally, when the magazine with the floorplate and incorporated pin is placed inside the handgun, it allows the handgun to be also used as a hammer-like tool for the breakage of glass panes.

Abstract: A magazine configured for use with a 22 caliber conversion kit and/or a non-converted 22 caliber firearm includes an elongate, hollow, rectangular housing for receiving an ammunition belt on a splined belt pulley. A slide of the firearm applies an impact force to a strike wheel to pivot a cam against a spring-loaded rack. The rack moves downward and causes a rack gear to rotate a drive gear freely in the slip direction of a unidirectional bearing. When the impact force is removed, the spring-loaded rack returns upward under the biasing force of the spring causing the rack gear to rotate the drive gear on the unidirectional bearing in the drive direction. The drive gear turns a drive axle, which turns the splined belt pulley to advance the ammunition belt sufficiently to position the next round of ammunition for entry into the firing chamber.

Abstract: An ambidextrous magazine release for a firearm is provided for a firearm having a magazine well configured to operatively receive a magazine having a side-locking recess received within the well. The ambidextrous magazine release comprises a linkage moveable between an engaged position and a disengaged position having a lock pin configured to be received in a side-locking recess of a magazine operatively received in the magazine well with the linkage in the engaged position and to clear the side-locking recess with the linkage in the disengaged position. An actuator is provided on the firearm comprising a bar having a opposing push surfaces extending between a right and left side of the firearm. An interface is provided between the linkage and actuator with the interface being configured so that as either of the opposing push surfaces of the bar is pushed by a user, the linkage is moved between the engaged and the disengaged position.

Abstract: A modular magazine for a firearm is disclosed. The magazine has a tower and a magazine body. The tower and magazine body are modular and can be disconnected from each other. When disconnected, the tower can be paired with other magazine bodies. Also, the magazine body may be connected to other suitable towers. Different towers may allow a magazine to connect with a plurality of styles of firearm. Also, a plurality of styles of magazine may be used with a single firearm when connected to a suitable modular tower.

Abstract: A firearm magazine housing contains a spring to forcibly urge a follower with ammunition rounds stacked thereon toward an open end of the housing, thereby to facilitate delivery of the ammunition rounds into the firing chamber of a firearm. A follower support apparatus disposed within the housing supports the follower for movement in the housing, and permits the ammunition rounds to be stacked onto the follower independently of the spring.

Abstract: A firearm includes a magazine cavity in a handle defined by a frame. A stack of chamber tubes each holding a cartridge is loaded into the magazine cavity. A firing recess just to the rear of a bore defined in a firearm barrel receives the topmost chamber tube and cartridge and is urged against a partially circular contour defined within the recess by a feed spring which contour center is aligned with the bore. Each cartridge is fired while in its chamber tube by a firing mechanism and each chamber tube and fired cartridge are both ejected by gas pressure exerted on one side of the chamber tube through an ejection port defined by an opening in one side of the firing recess remote from the one side of the chamber tube. The ejection port allows a chamber tube positioned therein to be readily viewed or felt through the ejection port to make it possible to easily and reliably determine if the firearm is ready to be fired.

Abstract: An apparatus for luminescing munitions having a coating of or containing a photoluminescent material. The apparatus employs the use of a conventional firearm magazine as a housing for accommodating the ammunition. A light emitting means is incorporated in the magazine for illuminating the photoluminescent material by exciting the photoluminescent material. The light emitting means is based on an LED producing an ultraviolet light component and relatively low or non-existent red, orange and infrared components when electrically actuated. The light emitting means receives its energy source from batteries contained within the magazine. Alternatively, a chemiluminescent device capable of producing light may be employed in place of the batteries as the energy source.

Abstract: The present invention relates to magazines for firearms, and more particularly to magazines that accept blank cartridges for training and other exercises and that prevent the introduction of live cartridges. In an embodiment, the safety magazine includes an internal cavity that is shorter in length than a live ammunition cartridge. The internal cavity accepts shorter blank ammunition cartridges. The top-most ammunition cartridge in the magazine sits just under the magazine's feed lips, in the top-most ammunition position. A projection extends from the top end of the magazine opposite the feed lips to block a longer live ammunition cartridge from being inserted into the top-most ammunition position. Thus, live cartridges cannot be loaded into the magazine even at the top-most position of the magazine. The projection is retractable into the magazine.

Abstract: A detachable magazine for storing and delivering ammunition to a firearm having a magazine well. The magazine has a body with a column adapted for insertion into the magazine well. The column has a passage for transmitting ammunition to the firearm. The body includes a drum housing defining a substantially cylindrical chamber communicating with the column passage. A first sprocket element is rotatably received in the chamber and has a serrated periphery, with each serration adapted to receive an ammunition cartridge. A second sprocket element is rotatably received in the chamber, and is concentric with the first sprocket element, having a serrated periphery with each serration adapted to receive an ammunition cartridge. A spring element is connected to at least one of the sprocket elements, and operates to rotatably bias the sprocket elements to transmit cartridges from the drum chamber to the column passage.

Abstract: A magazine for shotgun shells for use with a shotgun including an open frame housing having a generally flat front and a generally flat rear portion connected and separated by spacers. The flat front and flat rear portions each include an annular groove, the annular groove forming an annular path along which the shells travel. A rotatably mounted cog wheel for carrying the shells along the annular path and a coil spring for rotating the cog wheel such that shells can be manually loaded into the magazine against a force generated against the spring and automatically dispensed by the spring.

Abstract: An improved firearm including a non-detachable, pivoting magazine is disclosed. The magazine is pivotally attached at its rear end to a sliding arm. The sliding arm is slidably retained within the magazine well of the firearm. The sliding arm is configured to move upwardly and downwardly within the track to allow the magazine to be raised into and lowered out of the magazine well. When the magazine is lowered out of the magazine well, the magazine can be pivoted about its pivotal connection with the sliding arm such that a front end portion of the magazine pivots downwardly and rearwardly to allow ammunition cartridges to be loaded into and unloaded from the magazine.

Abstract: An ambidextrous magazine release for a firearm is provided for a firearm having a magazine well configured to operatively receive a magazine having a side-locking recess received within the well. The ambidextrous magazine release comprises a linkage moveable between an engaged position and a disengaged position having a lock pin configured to be received in a side-locking recess of a magazine operatively received in the magazine well with the linkage in the engaged position and to clear the side-locking recess with the linkage in the disengaged position. An actuator is provided on the firearm comprising a bar having a opposing push surfaces extending between a right and left side of the firearm. An interface is provided between the linkage and actuator with the interface being configured so that as either of the opposing push surfaces of the bar is pushed by a user, the linkage is moved between the engaged and the disengaged position.

Abstract: The invention is mounted on the forward end of a firearms magazine using an adapter that replaces the magazine cap. The invention contains a small bulb (LED, incandescent, or any other available source of light, visible or invisible), at least one battery, and an internal or external actuating switch. Depending on the size requirements of the user, the invention can also increase the amount of ammunition the firearm is capable of carrying by extending the length of the magazine tube. The light emitted from the invention will be aligned with the muzzle of the weapon and illuminate the area that the weapon is pointed at.

Abstract: A high feed ramp for use in Colt 1911 style handguns including a feed ramp on the frame (receiver) for guiding bullets into the barrel of the gun; a boiler room (barrel breech) with a small chamfered around its entire inner circumference; and an integral relief rim extension on the upper edge of the feed ramp, such that the feed ramp is extended over the bottom edge of the chamfered boiler room; wherein when the handgun is fired the bullets easily enter into the barrel and do not jam or misfire.

Abstract: A magazine for a firearm may include a cavity that is shaped to prevent the tip of the bullets in the cartridges from contacting the magazine when the firearm recoils. The magazine may also be configured so that the cartridges in the magazine exit the cavity at least approximately in the center of the magazine. The magazine may be configured to include a biasing mechanism that pushes the cartridges upward in the cavity. The biasing mechanism may be configured to allow the magazine to be compact, simple, and reliable.

Abstract: What is new in the firearm technology: The Twin Chambers Magazine provides double cartridge capacity to feed a firearm than present magazines of the same length. Its separated chambers have a wider internal relation, have perforated guides for the elevators, are synchronized by its mechanism that does not require electric power. This makes 2 independent magazines work together feeding one common mouth, can be use in some firearms without modifications and can be produced for any present cartridge. Its stopping mechanism allows one chamber to begin to work until the other chamber is already empty, working in serial and orderly: first the left one, then the right one. The TCM avoids changing frequently empty firearm's magazines, providing more cartridges and saving time, has a reduced size compare with the drum and spiral magazines, and does not present jamming if it is stored loaded for a long time.

Abstract: A magazine for introducing a plurality of ammunition cartridges into a firearm is disclosed. Particularly, a magazine may include a first rotor configured for rotating about a first center of rotation and a second rotor configured for rotating about a second center of rotation, wherein a position of the first rotor and a position of the second rotor are fixed with respect to one another. Further, operation of the first and second rotor may cause at least one ammunition cartridge of a plurality of ammunition cartridges that are movable by the first and second rotor to move along a serpentine path. Firearm systems including such a magazine are also disclosed. Another aspect of the present invention relates to a method of introducing an ammunition cartridge into a firearm. More specifically, an ammunition cartridge may be moved along a selected serpentine path prior to introducing the ammunition cartridge into a firearm.

Abstract: A magazine for improved stacking capacity includes a housing, a front wall connected to a back wall by sidewalls, a base, a spring adapted to be received inside a recess in the base in order to reduce the space occupied by the spring. The spring having various spiral sections wherein the spiral section having different lengths so that the spiral sections fit into each other when the spring is compressed against cartridges in order to enable stacking of additional cartridges.

Abstract: The present invention can have an adjustable length adapter that attaches to the firearm, and in one embodiment directly to an existing load tube. A mounting assembly and an indexing assembly are further provided. The mounting assembly has a mounting plate with an alignment hole for allowing a shell to pass there through from an aligned tube and into the adapter. The indexing assembly indexes relative the mounting assembly to successively align one of a plurality of tubes with the alignment hole. As one tube fills, the invention can be rotated to index the next tube and tension a rotator that can be positioned generally parallel to the firearm barrel. This process can be repeated until all four tubes are full. Upon emptying of a tube, a pin can be automatically activated to allow the indexing assembly to rotate relative the mounting assembly to align the next successive tube.

Abstract: A gun magazine, such as for an automatic pistol, includes an elongate tube for holding cartridges in stacked relationship including a clip for hanging the magazine in inverted position on a support, such as the lip of a pocket or a belt. The clip may be an integral element of the magazine butt plate or may be an add-on attached to the magazine tube or butt plate. The clip includes an outwardly projecting hanger portion projecting outward and a retention portion a free end disposed upward hanger portion and forming a channel between it and the tube, the channel having a mouth for receiving the support. The support may include a bump guard for preventing objects from accidentally upwardly bumping the clip and dislodging it from the support.

Abstract: A magazine support reinforcement for a machine gun having a receiver. A magazine support is attached to the underside of the receiver. The magazine support reinforcement is connected to the magazine support. The reinforcement includes a front support, a rear support and a fastener for fastening the front support to the rear support. The front and rear supports include bracing members having a generally concave side and a lug portion.

Abstract: A method of loading individual caseless cartridges sequentially into a firearm firing chamber by the expansive force of a small detonation in the magazine focused locally on the current top cartridge in a magazine without damaging remaining cartridges. Small individual propelling charges containing an igniter microchip located in the magazine behind each cartridge provides the loading thrust. More energetic charges containing igniter microchips are imbedded in the cartridges to fire the cartridge in the firing chamber at will.

Abstract: A floorplate for a handgun magazine is used for the breakage of glass panes and is manufactured so that it fits all types of handgun magazines without disrupting the overall function of either the magazine or the handgun. The floorplate has a hole in which a pin is incorporated. The floorplate, when placed on the magazine of the handgun, allows the magazine to be also used as a hand tool for the breakage of glass panes. Additionally, when the magazine with the floorplate and incorporated pin is placed inside the handgun, it allows the handgun to be also used as a hammer-like tool for the breakage of glass panes.

Abstract: A multi-caliber ambidextrously controlled firearm that includes an adjustable ejection system to facilitate the ejection of spent cartridge casings from a firearm. The adjustable ejection system includes an ejection port defined by an aperture in the firearm and a deflector. The deflector is attached to the firearm to adjust the size of the ejection port and may be attached at one of at least two attachment positions of the firearm. The adjustable ejector system includes an ejector selectively attached to the firearm at one of at least two ejector attachment positions. The improved firearm also includes an ambidextrous magazine catch system for selectively retaining a magazine within a firearm. The magazine catch system includes a first button opposite a second button such that either button may be actuated by a user to release the magazine retained with the firearm.

Abstract: A magazine for a toy gun includes a housing, at least one projectile disposed within the housing, and a constant-force spring disposed within the housing for providing a biasing force against the at least one projectile. The at least one projectile is made of elastomer or polymer foam material having a density between about 0.020 g/cm3 (1.25 lbs/ft3) and about 0.833 g/cm3 (52 lbs/ft3), and a 25% compression resistance (compression deflection) between about 0.6 psi and about 20 psi. The magazine is capable of holding and dispensing the projectiles such that the biasing force of the constant-force spring does not excessively deform the projectiles.

Abstract: Embodiments of the invention are directed to a magazine and follower assembly for use with a semi-automatic handgun. The assembly may include a magazine body configured to be received within a recess in a handgun. The magazine body has an open top end including a pair of magazine lips sized to retain cartridges within the magazine body. A follower is housed within the magazine body and is biased against the force of a compression spring. The follower has a resting face configured to accommodate the outside profile of a cartridge body and further includes a protrusion disposed along the resting face. The protrusion maintains contact between the magazine lips and an uppermost cartridge loaded within the magazine body.

Abstract: An improved base pad for a firearm magazine that more securely attaches to the bottom of a magazine tube in a manner which is easier and faster to attach or remove therefrom when cleaning the magazine. The improved base pad has a body member with a pair of ends and a pair of sides. The sides each have a groove configured to slidably receive, preferably snugly, the lips at the bottom of a standard magazine tube. One end of the base pad has an outwardly extending section with an upwardly facing, generally planar face. A securing mechanism at the outwardly extending section has an upwardly disposed projection that selectively engages one wall of the magazine tube to secure the base pad thereto when in its engaged position and allows removal of the base pad when in a disengaged position. In a preferred embodiment, the securing mechanism is a detent device.

Abstract: A magazine for an automatic shell-firing weapon mounted on a gun carriage, wherein the magazine is adapted to contain a belt and comprises two closed magazine portions interconnected by a closed transfer channel. The two magazine portions are disposed on opposite sides of the weapon. In a fully loaded state of the magazine, a front section of the belt is disposed in a first magazine portion disposed on a belt supply side of the weapon. The upper part of the first magazine portion has a removal opening that faces the weapon. A rear section of the belt is disposed in a second magazine portion on the opposite side of the weapon. A middle section of the belt is guided through the transfer channel.

Abstract: A magazine for a firearm includes an elongated containing body and a closure member adapted to hold cartridges. The closure member longitudinally slides on the containing body and is extendable to open a side of the containing body for cartridge loading. The closure member has opposing sidewalls forming an integral handle surface that can be grasped for moving it. A follower and spring bias cartridges toward one end of the magazine. A latching mechanism is provided for holding the follower in a disengaged position when the closure member is extended, and is configured to release when the closure member is closed. Preferably, the containing body and closure member are constructed to include integrally formed features that cooperate with an automatic latching mechanism, thus minimizing parts.

Abstract: A magazine doubler includes a resilient body with two cavities each having upstanding ribs to carry magazines therein at different heights. A bracket and spaced screws are mounted medially between the front and back of the body to squeeze the body to generally conform it to carried magazines therein. A blocking element is used to replace the top round in one magazine to prevent the upper round from being dislodged during use of the doubler. Such element is tethered and biased by a rubber band looping around one of the screw shanks.

Abstract: A triggerguard-floorplate assembly that utilizes two magazine retaining latches as opposed to one. The latches are of the spade design and located in the fore and aft of the magazine well. A torsion spring is inserted into both latches and pivots the latches into the magazine. When the latches and magazine are gripped together, the magazine may be pulled downward and removed.

Abstract: A cartridge magazines for a handgun, which magazine includes a closed or closable bottom at its lower end and an opening at its upper end, from which one cartridge each is supplied to the handgun, is at least largely surrounded by a single-part, elastic and removable sheath to protect it against soiling and against sand. The sheath is bag-shaped and is slipped over the cartridge magazine upside down so that the rim of the sheath will contact the region of the bottom of the cartridge magazine.

Abstract: A magazine for a firearm having a magazine well has a body with the chamber for receiving ammunition. The body has an upper opening to the chamber, and has a contact portion with adjustable screws that contact a surface in the magazine well. Adjustment of the screws is used to establish a precise selected position of the magazine with respect to the receiver, permitting adjustment of the feed height, feed angle and ejector position. Four screws are provided, one at each corner of the upper surface of the magazine.

Abstract: A system and method for providing increased capacity to a firearm having an actuator operably connected to a trigger assembly is disclosed. A magazine for holding a cartridge for use with the firearm includes a plurality of tubes, each tube being defined within the magazine and including an open end. The plurality of tubes being axisymmetric about a longitudinal axis of the magazine. A retainer, mounted about the open end of the tubes and being adaptive to impede release of the cartridge from the open end of the tube, being operably meshed with the actuator wherein the retainer and the actuator cooperate to permit removal of the cartridge from one of the plurality of tubes.

Abstract: A magazine for improved stacking capacity includes a housing, a front wall connected to a back wall by sidewalls, a base, a spring adapted to be received inside a recess in the base in order to reduce the space occupied by the spring. The spring having various spiral sections wherein the spiral section having different lengths so that the spiral sections fit into each other when the spring is compressed against cartridges in order to enable stacking of additional cartridges.