Abstract: The present disclosure relates a buttstock accessory port system, comprising a body, a recoil pad, and an insert. The body includes a bridge and a cavity. The recoil pad attaches to the body and incudes an opening. The insert is insertable through the recoil pad opening and insertable into the cavity of the body.

Abstract: The present disclosure provides systems and techniques that can be implemented in a gun. The gun may include a magazine retainer that is capable of retaining a magazine within a magazine well of the gun, and the magazine retainer may be operable to controllably release the magazine from the magazine well on demand. The magazine retainer may include a first paddle extending radially in a first direction from an axis of rotation, a second paddle extending radially in the first direction from the axis of rotation, where the axis of rotation is defined through a transverse member of the second paddle, and a catch extending radially in a second direction from the axis of rotation, where the catch is coupled with both the first paddle and the second paddle such that rotating the first paddle or the second paddle results in displacement of the catch.

Abstract: A mechanism for loading suspended loops of linked ammunition onto rails of an ammunition magazine includes a guideway and a carriage. The guideway has cam surfaces and cam slots each extending vertically from a lower portion of the guideway and curving near an upper portion of the guideway toward the rails at a loading end of the magazine. The carriage includes a support block slidably received by the guideway and a tandem bucket mounted on the support block by a linkage. The tandem bucket includes inner and outer followers engaging the cam surfaces and cam slots. The tandem bucket is horizontal and may be loaded with two adjacent rounds of a belt of linked ammunition when the carriage is at a lowered position. The carriage may then be raised manually, wherein the tandem bucket is articulated by camming engagement of the followers to a vertical orientation to deposit one of the two rounds onto the magazine rails with the other round and trailing rounds suspended therefrom.

Abstract: An offset magazine release button includes a body portion and a generally stairstep-shaped end portion. The body portion may be inserted into a magazine release opening of a firearm. The stairstep-shaped end portion may include an indention portion providing or creating a floor or floor portion and a narrow stairstep riser. The floor, when part of the assembled firearm, is generally flush with the firearm's gripping surface to create an augmented gripping surface that may allow the operator to have a higher grip to help control recoil. The end portion also includes an offset contacting pad. The floor transitions to the riser, which then transitions to the pad. The pad has a generally perpendicular ledge or surface extending toward an actuating thumb position of the operator's grip. The pad surface may be textured to provide for better contact with the operator's thumb when depressing the button to release a magazine.

Abstract: Firearms including magazine holders operable from either side of the firearm. The magazine holder includes two interconnected actuating elements, pivotable with respect to one another and separable from one another by longitudinal shifting, and a spring. The magazine holder is configured so that when pressure is applied to a right actuating element, a moment of force is applied to a first actuating element, which it cannot follow, and so both actuating elements, without changing their relative position to one another, are shifted against the force of the spring normal to the weapon median plane, removing a locking extension from the magazine housing. Upon actuation of the left actuating element, a stop on the right actuating element prevents its shift transverse to the weapon median plane, and so the first actuating element pivots against the force of the spring, and the locking extension is again moved from the locking element.

Abstract: A device implementable on a firearm includes a magazine release having a magazine catch and a magazine release button coupled to the magazine catch. When the magazine release is installed on the firearm, the magazine catch is configured to hold a magazine in a magazine well of the firearm when the magazine release button is not pressed and the magazine catch is configured to release the magazine from the magazine well when the magazine release button is pressed. The magazine release button includes a coupler configured to couple the magazine release button to the magazine catch. The magazine release button also includes a detachable pedal slidingly attachable to the coupler.

Abstract: A receiver for a firearm and a method of disposing the receiver to prevent automatic reloading and/or trigger reset of a firearm are disclosed. A blocking mechanism is moveable between an upward and a downward position and the blocking mechanism is in the downward position when the firearm is in battery. The blocking mechanism automatically moves to the upward position after a round is fired and the blocking mechanism prevents automatic reloading and/or trigger reset of the firearm when in the upward position.

Abstract: A slide action conversion assembly for converting a gas operated rifle into a manually operated slide action rifle. The conversion assembly replaces the gas operating system of the rifle with a linkage assembly attached to the original bolt carrier at a rearward end and to a sliding handguard grounded to a replacement stationary handguard at forward end. The linkage reciprocates within one degree of freedom along a path parallel to the barrel in order to manually cycle the converted firearm. The conversion assembly further incorporates a sliding handguard locking mechanism to prevent manual cycling when the firearm is in battery.

Abstract: Adjusting the length of firearms using stock assembly systems are provided. In one embodiment, a stock assembly comprises: a receiver extension having a first interface configured to mate with a second interface of a stock; the first interface comprising a base portion, a plurality of first edges, and a plurality of first grooves; the second interface comprising a slot portion, a plurality of second edges, and a plurality of second grooves; wherein the plurality of first edges are in contact with the plurality of second grooves and the plurality of first grooves are in contact with the plurality of second edges of the second interface to mate the stock with the receiver extension; and wherein the base portion of the first interface is in contact with the slot portion of the second interface allowing the stock to slide along a horizontal axis of the receiver extension.

Abstract: A magazine well unit and a method are disclosed. The magazine well unit may have an upper portion having a firearm interface; a lower portion; a proximal portion; and a distal portion. The distal portion may have a magazine well to removably receive a box magazine. The magazine well may have at least one fore stop and at least one aft stop, the at least one fore stop and the at least one aft stop shaped to prevent the box magazine from passing beyond the upper portion of the magazine well unit. At least one of the fore stop or the aft stop may have an upper portion region having a surface for engaging the firearm.

Abstract: A firearm comprising: (i) an ammunition magazine which automatically ejects from the lower receiver of the firearm when the ammunition magazine is spent; (ii) a control group comprising a magazine release mechanism for releasing the magazine catch so that the ammunition magazine is detachable from the lower receiver, a bolt catch engage mechanism for engaging the bolt catch with the bolt carrier and retaining the bolt carrier in the retracted position, and a bolt catch release mechanism for releasing the bolt catch from the bolt carrier and allowing the bolt carrier to move forward, wherein the control group components can be operated by the user on either the left side or right side of the firearm; and (iii) optionally, a charging handle which can be operated by the user on either the left side or right side of the firearm.

Abstract: A method and apparatus for enabling handgun magazines to function in a rifle lower forging, may include a rifle lower forging. The rifle lower forging may include but is not limited to a recessed area on a side portion of the rifle lower forging configured to receive a handgun magazine release. The rifle lower forging may further include a vertical hole on a top portion of the rifle lower forging configured to receive an elongated portion to hold the handgun magazine release. The rifle lower forging may further include a hole perpendicular to the vertical hole configured to receive a handgun magazine release spring. The rifle lower forging may further include a horizontal slit on the top portion of the rifle lower forging configured to receive an ejector. The rifle lower forging may further include one or more apertures perpendicular to the horizontal slit each configured to receive a fastener to secure the ejector to the rifle lower forging.

Abstract: An automatic magazine ejection system is disclosed. The automatic magazine ejection system comprises a modified bolt catch, a release switch, and a pivotable magazine catch. The modified bolt catch pivots from a first position to a second position. When in the second position the bottom of an external part of the modified bolt catch moves toward the firearm. The release switch is connected to the modified bolt catch. The bottom of the release switch engages the end of the pivotable magazine catch to pivot the end of the magazine catch out of the magazine well and permit the automatic removal of the magazine. If the release switch is slid to an “off” position then the bottom of the release switch does not engage the pivotable magazine catch when it moves and the magazine is not removed from the magazine well.

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

Abstract: A receiver and a method for manufacturing it are disclosed. The receiver contains an incomplete receiver containing a first receiver opening configured to accommodate an ammunition magazine, a second receiver opening containing a first and a second protrusion, a buffer tube insert containing an upwardly extending lobe, a first side panel positioned within the second receiver opening, the first side panel containing a first panel opening configured to accommodate the first protrusion, a second side panel positioned within the receiver second opening, the second side panel containing a second panel opening configured to accommodate the second protrusion.

Abstract: Broadly, the present embodiment is a magazine locking device. The present embodiment locks a magazine in the magazine well when an AR-15 style rifle's upper and lower receivers are closed together. When an AR-15 style rifle's upper and lower receivers are closed, the present embodiment will allow a magazine to be inserted into the firearm. When a magazine is fully inserted into the magazine well the magazine is fixed in place. In order to release the fixed magazine that is retained in an AR-15 style rifle magazine well by the present embodiment, the upper and lower receivers of an AR-15 style rifle must be opened, or separated. The instant the upper and lower receivers of an AR-15 style rifle are separated the fixed magazine is automatically released. The present embodiment is returned to the closed position when an AR-15 style upper receiver is closed onto the lower receiver.

Abstract: Apparatuses and methods to convert a semi-automatic firearm with a detachable magazine to a semi-automatic firearm with a fixed magazine and release mechanism, including one or more of a catch plate, a modified bolt catch, and/or a modified magazine release bar.

Abstract: Broadly, the present embodiment is a magazine locking device. The present embodiment locks a magazine in the magazine well when an AR-15 style rifle's upper and lower receivers are closed together. When an AR-15 style rifle's upper and lower receivers are closed, the present embodiment will allow a magazine to be inserted into the firearm. When a magazine is fully inserted into the magazine well the magazine is fixed in place. In order to release the fixed magazine that is retained in an AR-15 style rifle magazine well by the present embodiment, the upper and lower receivers of an AR-15 style rifle must be opened, or separated. The instant the upper and lower receivers of an AR-15 style rifle are separated the fixed magazine is automatically released. The present embodiment is returned to the closed position when an AR-15 style upper receiver is closed onto the lower receiver.

Abstract: A rotating bolt firearm may be configured to fire a .308 cartridge. However, the firearm may have a reduced weight in comparison to standard .308 rifles. The firearm may have many components typically used in a .223 rifle. The firearm may include a barrel extension with an extractor gap, which allows a .308 bolt to fit within a .223 sized barrel extension. The firearm may comprise an elongated magazine well in comparison to a .223 mil-spec rifle. The firearm may weigh less than 6.8 pounds with a 16 inch barrel, or less than 6.3 pounds with a 10.5 inch barrel.

Abstract: A bolt for a bolt-action firearm in one embodiment is movably disposed in a receiver between forward closed breech and rearward open breech axial positions. The bolt includes an operating handle and plurality of bolt lugs arranged to selectively engage locking lugs in the firearm. The bolt is rotatable between locked and unlocked breech positions when in the closed breech position. The bolt body has a dimensionally reduced middle section with unique configuration adapted to allow the bolt to rotate when closed without interference from the magazine feed lips. Using this design, the bolt may include three bolt lugs in one embodiment for secure lockup and minimal angular rotation between the locked and unlocked breech positions. The bolt is usable with both single and double stack box type magazines with one of the bolt lugs operating to reliably strip cartridges from either type magazine.

Abstract: A gunsmithing block is disclosed. The gunsmithing block has a first end for interfacing with a vice, and a second end shaped to interface with an upper receiver assembly of a firearm, the upper receiver assembly having an upper receiver, a bolt carrier without a bolt, and a barrel extension. The second end has an upper receiver mating portion shaped to interface with an interior region of the upper receiver and an interior region of the barrel extension. Methods of using and making a gunsmithing block are also disclosed.

Abstract: A device for converting a firearm to a fixed magazine is disclosed. The device includes a magazine catch member having a through hole, and a one way threaded member comprising a threaded section and a head. The threaded section is able to pass through the through hole, and the head is configured so that a screw driver is only able to rotate the one way threaded member in a tightening direction. A kit for enabling a user to fix the magazine is also disclosed. A method for loading a magazine having a fixed magazine is also disclosed.

Abstract: The proposed invention relates to small arms, specifically to charging devices for charging magazines with cartridges and to meters for cartridges in box magazines. The technical result consists in providing a universal charging device and meter for cartridges in box magazines which makes it possible to achieve rapid charging and discharging of cartridges to and from said magazines and visual and tactile monitoring of the number of said cartridges in box magazines which have been withdrawn from and inserted in a weapon. The device has a minimal weight and can easily be built into any box magazine of an automatic machine gun or a pistol having a spring-loaded cartridge feed mechanism.

Abstract: A firearm receiver assembly that includes a magazine release assembly, a bolt release assembly, a safety switch assembly, and a charging handle assembly and wherein at least one of the magazine release assembly, the bolt release assembly, the safety switch assembly, and the charging handle assembly are ambidextrously operable from each of a right hand side and a left hand side of the resultant firearm.

Abstract: Magazine block device for firearm dry fire practice which allows a user to practice proper firearm handling skills without expending ammunition, including recocking and actuating the firearm slide without pressing the slide lock release. In an aspect, a magazine block device is provided having a bullet-shaped body, two upper ridges forming a longitudinal channel through which the firearm breach face loading tab may pass without dislodging the magazine block device, and an offset lower ridge. The lower ridge is configured to evenly force a magazine follower down a sufficient distance to prevent actuation of the firearm slide lock. This allows dry fire practice of pulling the slide. Several other features include ridges to assist a user to remove and load the block device in and out of a magazine, as well as a pocket to mechanically remove same.

Abstract: A device for converting a firearm to a fixed magazine is disclosed. The device includes a magazine catch member having a through hole, and a one way threaded member comprising a threaded section and a head. The threaded section is able to pass through the through hole, and the head is configured so that a screw driver is only able to rotate the one way threaded member in a tightening direction. A kit for enabling a user to fix the magazine is also disclosed. A method for loading a magazine having a fixed magazine is also disclosed.

Abstract: A game controller includes a first mock firearm action associated with a first weapon mode and a second mock firearm action associated with a second weapon mode. If first mock firearm action is enabled, it can generate a load command when the first mock firearm action is operated. If second mock firearm action is enabled, it can generate a load command when the second mock firearm action is operated. The game controller includes a mode selector, to enable the first mock firearm action when the game controller is in the first weapon mode and to enable the second mock firearm action when the game controller is in the second weapon mode.

Abstract: A magazine lock and release mechanism for a firearm provides a left and right side magazine release, but prevents release of a magazine of a firearm without a tool. The mechanism comprises a magazine catch pivotable between an engaged and a disengaged position having a magazine catch tooth situated to engage a magazine inserted into a magazine well.

Abstract: An apparatus for releasing firearm magazine comprising an outer button, an inner button, a first spring and a securing plate wherein the inner button and the first spring is located within the outer button by the securing plate a lower receiver of a rifle a second spring and a magazine catch wherein the magazine catch is comprised of a shaft and a threaded portion wherein the second spring is positioned over the shaft and is further posited inside the lower receiver the threaded portion is functionally engaged to the inner button such that the inner button can be adjusted along the length of the threaded portion the outer button further comprising a stopping device along the perimeter of the outer button wherein the stopping device prevents the movement of the outer button towards the lower receiver.

Abstract: A method and apparatus for intentionally slowing the speed at which detachable ammunition magazines can be interchanged in a firearm receiver. A magazine catch assembly includes a latch adapted to engage a recess of a standard magazine in the magazine well. A hand-activated crank interacts with threads of a push-rod portion of the latch so that manual rotation of the hand crank in one direction (e.g., counter-clockwise) displaces the latch after a sufficient number of turns. Reverse rotation of the hand crank returns the latch to its engaged condition ready to automatically re-engage the next magazine inserted into the firearm receiver. Alternatively, viscoelastic foam or other mechanical time-delay feature can be used instead of screw threads to introduce a mechanically transmitted dwell period before the latch is actuated.

Abstract: A lever protects against inadvertent release of a magazine of a firearm if its ambidextrous release is hit by equipment when the firearm is carried. The lever is made from a projection, above the pivot point, having two opposing angles forward of the depression surface. The projection impacts the equipment before the depression surface is impacted (straight-on impact), which protects the assembly from inadvertent release of the magazine. An impact to the rear angle of the projection (a rear impact) increases the engagement of the lever with the magazine. An impact along the forward angle (from the front or straight-on) of the projection also serves to increase engagement of the lever with the magazine. The lever, with its projection having opposing angles, is specifically designed to protect the lever of an ambidextrous magazine catch from inadvertent release by impact/snag in the field.

Abstract: Example cartridge magazines for use within a curved handle of certain pistols have a laterally curved housing so that the pistols and magazines can fit comfortably along a user's body. Such curved pistols and magazines are particularly suited for carrying within a shirt or pants pocket. A curved pistol loaded with a curved magazine, for instance, can be carried comfortably in one pocket while an extra loaded magazine can be carried in another pocket. Example magazines carry single and multiple rows of cartridges along appropriately sized curved housings. The magazine's curvature provides a user with a prominent tactile feature that quickly indicates in which direction the magazine should be inserted within the pistol.

Abstract: A metal lower receiver for a firearm has a receiver body. A magazine receptacle is disposed in the receiver body and adapted to receive a removable cartridge magazine. A magazine securing lever is disposed on the receiver body. The receiver body has a feed ramp positioned at a slant relative to a barrel of the firearm. The feed ramp is adapted to lift during reloading of the firearm a projectile tip of a cartridge from a removable cartridge magazine inserted into the magazine receptacle and to guide the cartridge in a direction of a cartridge chamber disposed in the barrel.

Abstract: A gun is presented including a frame; a barrel connected to the frame; and a magazine mechanically cooperating with the frame, the magazine having at least one projectile stored therein. The gun further includes an electronic beacon non-removably incorporated within the gun, the electronic beacon configured to emit at least one signal to be received by at least one electronic device located within a pre-established vicinity of the gun. The electronic device provides a notification indicating proximity of the gun. The electronic beacon may be a radio transceiver operating at least one of a plurality of frequencies.

Abstract: A magazine release device is affixed to a firearm and operable from either side of the firearm. The device includes a shaft extending between opposite sides of the lower receiver and movable longitudinally between an engaged and a disengaged orientation. A spring biases the shaft into the engaged orientation. A plate, affixed to one end of the shaft, includes an inwardly directed catch that engages with a magazine when the shaft is in the engaged orientation and disengages from the magazine when the shaft is moved to the disengaged orientation. A right hand actuation button is affixed to the shaft on the right side of the lower receiver and a left hand actuation button is affixed to the plate on the left side and each actuation button controls the shaft and plate between the disengaged orientation and the engaged orientation.

Abstract: The present invention provides an automatic magazine ejector for a firearm. The invention provides a magazine ejection device for a firearm having a receiver, a magazine, wherein the magazine has an engaged state and a disengaged state of operation, comprising: a trigger housing having first and second opposing sides, a cavity defined by the first and second opposing sides, a pin spanning the cavity and a recess within at least one of the first and second opposing sides; and, a spring having first and second ends, the second end being disposed within the recess when the device is in use and wherein the first end being operably configured to engage and apply a force on the magazine when the device is in use and the magazine is in the engaged state. The invention also includes a method of modifying an existing firearm to include an automatic magazine ejection device.

Abstract: Example cartridge magazines for use within a curved handle of certain pistols have a laterally curved housing so that the pistols and magazines can fit comfortably along a user's body. Such curved pistols and magazines are particularly suited for carrying within a shirt or pants pocket. A curved pistol loaded with a curved magazine, for instance, can be carried comfortably in one pocket while an extra loaded magazine can be carried in another pocket. Example magazines carry single and multiple rows of cartridges along appropriately sized curved housings. The magazine's curvature provides a user with a prominent tactile feature that quickly indicates in which direction the magazine should be inserted within the pistol.

Abstract: A method and apparatus for intentionally slowing the speed at which detachable ammunition magazines can be interchanged in a firearm receiver. A magazine catch assembly includes a latch adapted to engage a recess of a standard magazine in the magazine well. An input pad receives an input signal from a user that initiates a count-down sequence. When the count-down sequence is finished, an actuator mechanism is displaces the latch to disengage the magazine for replacement. Return of the latch to the engaged position may be automatic or user-initiated. The count-down sequence may be electronic or manual. User input may require use of a specialized tool. The latch may be spring-biased toward the engaged condition. The input pad may be responsive to an authoritative wireless over-ride signal to remotely disable the firearm.

Abstract: Applicant has disclosed a Method and Apparatus for stripping and feeding cartridges to enhance stripping cartridges out of a detachable double-stacked magazine, inserted into a (well opening of a) receiver of a bolt-action rifle, and to enhance feeding the cartridges into the firing chamber. In the preferred “apparatus” embodiment, Applicant's device comprises two protrusions (“bumps”) integral with, and radially spaced around, a bottom of the breech bolt head. When the rifle's breech bolt is pushed through the receiver, towards the firing chamber, a flat front face of a protrusion engages the rim of the top cartridge, pushing the cartridge out of the magazine, over the feed ramp or lip, and towards a firing chamber of the rifle. The protrusions alternate as to which engages the next top cartridge(s), due to the staggered (zigzag) columns of the cartridges in a double-stacked magazine.

Abstract: New handgun configurations are enabled by a multiple cartridge magazine that includes the firing chamber for each cartridge. A hammer with a pivot pin below and between the leading and trailing edges of a chamber strikes the primer at an acute angle. A sliding trigger mechanism with cupped ball bearings in pockets facilitate sliding motion.

Abstract: A lower receiver for a modular firearm can include a first receiver portion that is removably attachable to a second receiver portion to form the lower receiver. An inner surface of the first receiver portion and an inner surface of the second receiver portion can together define a magazine cavity that is configured to receive a magazine. The lower receiver can be disassembled to provide easy access to inner regions of the lower receiver for cleaning, maintaining, or inspecting the modular firearm.

Abstract: A universal magazine latch mechanism operable to retain and release a magazine from a firearm. In one embodiment, the mechanism may include a frame defining a magazine well configured to insertably receive a magazine holding a plurality of cartridges, a rear catch lever pivotably mounted to a rear wall of magazine well about a first pivot axis, and a side catch lever pivotably mounted to the frame about a second pivot axis. The rear catch lever is operable to engage/disengage rear or front style latching magazines. The side catch lever is operable to engage/disengage side catch style magazines. The rear catch lever is an actuator for operating both the rear and side catch levers, thereby latching and releasing all three catch styles of magazines with a single user action.

Abstract: The present invention involves techniques for rapid, flexible, partial and supplemental reloading of firearms using specialized actions, intermediate storage devices/feeds and multiple magazines, which may, in some embodiments, be simultaneously engaged with a firearm. The techniques disclosed include a feeding system, which may be a multiple-magazine feeding system, that allows a firearm to remain loaded and firing-ready with multiple loaded cartridges at all times, even during reloading operations. The invention also includes other techniques for flexible, non-wasteful, partially-empty reloading, to eliminate reloading paralysis, and allow the soldier or other user, not the size of a magazine, to determine when firing should continue and when and if it should pause.

Abstract: A method and apparatus for intentionally slowing the speed at which detachable ammunition magazines can be interchanged in a firearm receiver. A magazine catch assembly includes a latch adapted to engage a recess of a standard magazine in the magazine well. An input pad receives an input signal from a user that initiates a count-down sequence. When the count-down sequence is finished, an actuator mechanism is displaces the latch to disengage the magazine for replacement. Return of the latch to the engaged position may be automatic or user-initiated. The count-down sequence may be electronic or manual. User input may require use of a specialized tool. The latch may be spring-biased toward the engaged condition. The input pad may be responsive to an authoritative wireless over-ride signal to remotely disable the firearm.

Abstract: A firearm for firing caseless ammunition, the firearm comprising a stock which is capable of receiving one or more magazines of caseless ammunition, a frame connected to the stock, one or more barrels, each barrel having a respective central axis and each of the barrels being connected to the frame, one firing chamber for each barrel in communication with each respective barrel, and one or more blocking plates wherein the one or more blocking plates each perform at least two functions, (1) it prevents more than one round of ammunition from being loaded into each respective firing chamber, and (2) at least one surface of the blocking plate is a surface of the firing chamber and wherein the blocking plate is movable in a plane orthogonal to each of the barrel central axes.

Abstract: A firearm having cartridges in a magazine is provided including a cartridge feed ramp disposed on the frame between the magazine chamber and the chamber end of the barrel. The cartridge feed ramp includes a base that is rigidly secured to the frame and a flexible tongue extending upwardly from the base, where the tongue acts as a spring and can deflect relative to the base. During a firing sequence, a top cartridge moves from the magazine in an upward direction toward the chamber end of the barrel, a front of the top cartridge contacts the flexible tongue of the cartridge feed ramp prior to entry by the cartridge into the chamber of the barrel, causing the flexible tongue to deflect outwardly in the direction of the front end of the barrel to assist the feeding of the top cartridge into the chamber end of the barrel.

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 rifle kit comprises a rifle receiver structure having a central passage configured for having a substantially as-manufactured breech bolt of a pistol mounted therein and has one or more shoulder stock mounting portions configured for having a shoulder stock structure engaged therewith. A substantially as-manufactured breech bolt of the kit is configured by an original equipment manufacturer (OEM) thereof for being mounted on a pistol receiver body configured by the OEM. The rifle barrel is mountable within the central passage of the rifle receiver structure. A chamber end portion of the rifle barrel is configured for engaging a mating portion of the substantially as-manufactured breech bolt. A shoulder stock structure of the kit includes a receiver structure engaging portion configured for allowing the shoulder stock structure to be mounted on the rifle receiver structure exclusively through engagement with the one or more stock mounting portions of the rifle receiver structure.

Abstract: A novel firearm is lightweight, compact, and the method of manufacture is easy. A single or dual tubular magazine positioned below the barrel of a firearm includes the novel use of an inverted U-shaped stamped sheet metal receiver with a cavity for housing a loading and ejection port. The present invention advances the art of firearm manufacture by disclosing a tubular magazine and stamped sheet metal receiver that encloses the major parts of a firearm. The firearm is simple to manufacture, lightweight, approximately 25 to approximately 27 inches in length, and affords an ammunition capacity that is at least twice the capacity of a comparable firearm, such as the Remington® 870 shotgun.

Abstract: A spring-loaded feed mechanism for a paintball loader. The feed mechanism includes an inner spool and an outer spool. A torsion spring is positioned between the inner and outer spools. The outer spool includes a pressure wall, from which the torsion spring is located on one end of the spring. A retaining wall is attached to the inner spool and is located at the opposite end of the torsion spring. When an operator of a paintball gun using the spring-loaded feed mechanism discontinues firing paintballs, the feed mechanism is stopped. Simultaneously, during the deceleration of the feed mechanism, the torsion spring is compressed, which allows the mechanical energy of the rotating feed mechanism to be stored within the compressed spring. When the operator desires to fire the paintball gun, the feed mechanism is accelerated to the requisite rotational speed. The compressed spring is release, thereby allowing the spring to assist in accelerating the feed mechanism to the necessary rotational speed.