Abstract: Devices and methods for reducing tension force on a projectile by a neck of a cartridge case. A two-stage neck has a clearance band and an interference band, the clearance band providing a reduced retention force on the projectile relative to the interference band.

Abstract: A bullet, having a longitudinal body on which is defined a set of radially spaced, longitudinally extending helical grooves corresponding to the rifling of a particular barrel and at least one circumferential drive band which intersects the set of helical grooves, to define a pressure retaining formation with a casing of a cartridge, in use.

Abstract: A delayed blowback system for a firearm is provided. The system includes a bolt with two detent members operatively coupled within the bolt, each detent member comprising a detent. The system further includes a recoil spring guide rod having two matching recesses on opposing sides of the recoil spring guide rod, wherein the bolt and the two detent members are coupled to and slidable along the recoil spring guide rod between a firing position and a recoil position. The firing position includes the detents resting in the matching recesses on the recoil spring guide rod in response to a round being fired, the bolt moves back and pushes the detent members back, wherein by nature of a geometry of the detents and the matched recesses, the detent members outward in opposite directions and perpendicular sliding along the recoil spring guide rail in the recoil position to complete a recoil cycle.

Abstract: An insecticidal gun including a gun body, a feeding member, a percussion member, a trigger, and an electric drive mechanism. The gun body includes a launching chamber; the feeding member is slidably connected to the gun body and includes a material storage chamber configured to communicate with the launching chamber. The electric drive mechanism is configured to drive the percussion member to move in the launching chamber. When the percussion member is driven by the electric drive mechanism to move, the feeding member moves along the axial direction of the gun body, so that the material storage chamber communicates with the launching chamber intermittently. The trigger is rotatable with respect to the gun body to activate or inactivate the electric drive mechanism.

Abstract: The present disclosure provides systems and techniques for authenticating a user at gun. The gun may include an authentication manager capable of implementing logic, processing signals, or executing instructions. The authentication manager may receive first query data from a first authentication sensor of the gun, receive second query data from a second authentication sensor of the gun, perform an authentication procedure to determine whether the first query data or the second query data matches enrollment data, where a match is determined based on the first query data or the second query data and the enrollment data satisfying a similarity threshold. The authentication manager may determine that the user is authorized to operate the gun and transmit a signal in response to the determining that the user is authorized to operate the gun. The signal may cause the gun to enter an active state which allows the gun to be fired.

Abstract: A plurality of trigger blocks are described. Embodiments of the trigger block can be implemented as a collapsible trigger block adapted to shroud a trigger to aid in preventing accidental discharges of a firearm. The collapsible trigger block can implement a linear ratchet assembly and a stop to secure the collapsible trigger block inside a trigger guard of a firearm.

Abstract: Ammunition cartridge including a rigid casing including a tubular sleeve and a base closing an end of the casing, a projectile mounted at another end of the casing, a propellant charge contained inside the casing, and an ignition device. The projectile includes a solid material body having a volume V1 extending between a tip to a trailing end, wherein the projectile further includes a cavity that extends into the body from the trailing end, a volume V2 of the cavity being at least fifteen percent (15%) of a combined volume V1+V2 of the projectile solid material and cavity: V2>0.15×(V1+V2).

Abstract: A mount assembly for attaching a firearm accessory to a muzzle of a firearm that promotes a more secure connection. The mounting assembly includes a front collar and a rear collar that are operable to clamp the mount assembly onto the muzzle. A detent ring mounted on the front collar yieldably biased by a spring against the rear collar to resist relative rotation of the front and rear collars. The mounting assembly is constructed so that the spring force applied by the spring does not continually increase as the front and rear collars move to clamp onto the muzzle. Detent springs used to yieldably hold the front and rear collars against relative rotation can be weaker than the main spring, which further reduces unwanted forces working against clamping of the mount assembly onto the muzzle. The mount assembly is also constructed to inhibit carbon lock.

Abstract: An ammunition box filling tool apparatus and method for filling a pre-folded card stock box having an open top portion with a plurality of units of ammunition is disclosed herein. The ammunition box filling tool apparatus includes a base portion, a perimeter wall extending upwardly from the base portion, a plurality of fingers extending upwardly from the base portion and surrounded by the perimeter wall, and a plurality of sectioned compartments defined one or more of the perimeter wall or the plurality of fingers. Each of the plurality of sectioned compartments is configured receive one of the plurality of units of ammunition. The method includes at least filling ammunition box filling tool apparatus with the plurality of units of ammunition, engaging the open top portion of the pre-folded card stock box with an upper edge of the perimeter wall and simultaneously flipping the two to transfer the ammunition.

Abstract: The invention relates to a paintball projectile comprising a front portion and a body portion, which body portion comprises a side wall. The paintball projectile comprises a body component, which is a single piece forming outer surfaces of the front portion and the side wall, a closed cavity in the interior volume of the front portion, a fill in the closed cavity, and a middle component in the interior volume of the body component, the middle component having a first side and a second side. The first side of the middle component is facing the closed cavity, and the projectile further comprises a barrier layer on the second side of the middle component. The invention further relates to a method for manufacturing paintball projectile.

Abstract: An adjustable gas block for a firearm comprises a housing adapted to be attached to a barrel of the firearm. The housing has a first passageway adapted to be aligned with a gas port in a barrel of the firearm and a second passageway adapted to receive a gas tube of the firearm, such that a bore of the barrel, the gas port of the barrel, the first passageway, and the gas tube are in fluid communication. A valve member is mounted in the housing for forward and rearward sliding movement and has a first portion and a second portion. The first portion has an upwardly facing surface having a radius of curvature that closely approximates a radius of curvature of an outer diameter of the gas tube, and the second portion has threads. A nut is carried by the housing for rotational movement and has threads mating with the threads on the second portion of the valve.

Abstract: An increased capacity replacement firearm ammunition magazine for a polymer or polymer-over-metal single stack firearm ammunition magazine for a Glock® handgun, comprises a metallic body dimensioned to compatibly replace the single stack magazine for the Glock® handgun, the single stack magazine having a body having exterior dimensions defined by polymer or polymer-over-metal forward, aft, and side walls, the metallic body having exterior dimensions defined by metallic forward, aft, and side walls, an exterior width dimension of the metallic side walls compatibly matching an exterior width dimension of the side walls of the single stack magazine body, the metallic walls being thinner than the walls of the single stack magazine, the thinner metallic walls allowing an at least partially laterally offset arrangement of cartridges in the metallic body, the forward wall of the metallic body including at least one spacer extending along the forward wall, the spacer sized such that a forward-to-aft exterior dimensio

Abstract: A safing sector assembly includes a safing sector frame securable to a minigun main housing, a top cover hingedly attached to the frame, and a safing gate hingedly attached to the top cover. The frame includes an aft camming portion of an elliptical cam track of the minigun on an underside thereof. The top cover is rotatable, while the frame is secured to the main housing, between a closed position and an open position. The safing gate includes a forward camming portion of the elliptical cam track on an underside thereof and is rotatable between an armed position and a safe position. The safing gate is only rotatable to the armed position while the top cover is closed. The safing gate latches the top cover closed, so the top cover can only be opened while the safing gate is in the safe position.

Abstract: A breech release for a shotgun includes a push button, a return spring, a spring retainer, a threaded steel rod, and a release slide. the return spring is located between the push button and spring retainer. when the breech release engages with a breech, the breech release bisects an outer breech which hinged an inner breech, holding the breech closed in its default position. When the button is depressed, the button moves the slide out of the inner breech, allowing the breech to open.

Abstract: Methods and systems are provided for firearm muzzle brakes. In one example, a muzzle brake comprises: a body; a projectile entrance and a projectile exit; a gas-actuated valve biased toward the projectile entrance within an interior of the body; and a projectile opening of the gas-actuated valve arranged along a projectile path between the projectile entrance and the projectile exit.

Abstract: Some embodiments include an optic guard for a firearm, the optic guard including: a frame; and a bracket having a side to attach to a firearm assembly, the bracket integrally formed with the frame or fixably attached to the frame; wherein the frame is arranged to cover part of a front of an optic housing when the side of the bracket is attached to the firearm assembly. Other embodiments may be disclosed and/or claimed.

Abstract: A boron steel high pressure cartridge case and method of manufacturing the same is provided. The method includes cold forming a cartridge case into a drawn blank or a tubular component; annealing the cartridge case using a belt furnace, flame furnace, induction furnace, or a batch furnace; performing a machine ejector slot and trim on the cartridge case; forming the shoulder and neck of the cartridge case; performing a heat treatment of the cartridge case; tempering the cartridge case; and coating the cartridge case with a zinc nickel plating. The cartridge case is fabricated of boron steel including ?1.0% boron.

Abstract: An ammunition article including a polymer cartridge case with a mouth at a first end, a second end opposite the first end, and a propellant chamber located between the first end and the second end. A projectile can be fitted into the mouth and a metal base insert can be joined at the second end. The metal base insert can include a primer. The metal base insert and the polymer cartridge case remain joined together as a single piece assembly upon loading, firing and removal from a chamber of a firearm for a polymer case temperature between about ?65° F. (?54° C.) to about 165° F. (74° C.).

Abstract: A method for uniformly sizing polymer-based cartridge necks in ammunition cartridges includes providing a neck sizer and aligning the polymer cartridge below the neck sizer. The cartridge is pressed into the neck sizer where the pressing step causes the cartridge neck to be compressed in the neck sizer so as to reduce the inner diameter of the cartridge neck to less than the maximum outer diameter of the bullet to be fired from the cartridge. The pressing step may also involve compressing excess polymer material from the cartridge neck through flutes in the collet die of the neck sizer to form external neck ribs about the outer surface of the neck. The neck ribs aid in concentrically aligning the polymer cartridge in the chamber of a firearm to improve accuracy of the bullet fired therefrom.

Abstract: A target sight system includes a base portion with a gun-mounting interface allowing the sight to be firmly fastened to a shooting device. The base also includes a power supply, a target light generator, and a light-passing surface through which the target light passes between the target light generator and a target. The sight system also includes a cover that is detachably removable from the base portion.