Abstract: A diopter adjustment mechanism comprises a scope tube with a first female thread and a second female thread. The first female thread has a first pitch and is disposed on the scope tube forming a spiral thread and lands between the spiral threads. The second female thread has a second pitch and is disposed on the lands of the first female thread. A jam nut has a male thread corresponding to and engaging the second female thread. The pitch of the first female thread is greater than the pitch of the second female thread.

Abstract: A metal or alloy insert may be used to reinforce the lip area of a firearm ammunition magazine. The metal or alloy insert may be positioned at the top of the magazine and on the interior of the magazine body, and may be overmolded by a polymer during the molding process to manufacture the magazine body.

Abstract: A magazine for a firearm is described. The magazine may include a magazine housing comprising a recess at a front wall of a magazine housing top portion facing a trigger bar of the firearm. The magazine may further include a locking unit configured to move between a locked position and an unlocked position. The magazine may further include a radio-frequency identification (RFID) reader disposed in the magazine housing. The RFID reader is configured to detect presence of a wearable device in proximity to the trigger bar. The magazine may further include a control unit configured to control locking unit movement based on inputs from the RFID reader. The control unit may be configured to move the locking unit from the locked position to the unlocked position when the RFID reader detects presence of the wearable device in proximity to the trigger bar.

Abstract: High pressure compressed gas pressure vessels and devices utilizing such vessels are disclosed herein. More particularly, aspects of the present invention are directed to high pressure (i.e., nitrogen or N2 based) pressurized gas cylinders with pierceable membranes recessed from the opening of the pressure vessel such that prior art piercing mechanisms cannot pierce the membrane for safety purposes. Additionally, aspects of the present invention are directed to pressurized gas operated devices with elongated pins for piercing pressure vessels with recessed pierceable membranes.

Abstract: A recoil mechanism has a hollow cylinder having a first portion adjacent to a closed end having a first inner diameter and a second portion adjacent to an open end having a second inner diameter, and an outwardly facing flange at the open end thereof. An outer spring is positioned over the hollow cylinder and has a second end in contact with the outwardly facing flange. A rod assembly includes a rod coupled to an endplate at a first end thereof and an enlarged portion towards a second end thereof, a washer mounted on the rod between the enlarged portion and the endplate, and a rod spring mounted over the rod between the small washer and the endplate. Moreover, the rod assembly is positioned within the hollow cylinder by inserting the second end of the rod into the open end of the hollow cylinder.

Abstract: A lower receiver assembly of a rifle including a lower receiver having a magazine well formed thereon between a distal end and a proximal end, the lower receiver operable to receive a trigger assembly including a trigger, a hammer, and a firing pin. The lower receiver can include an operating rod retention tab coupled with an upper surface of the receiver and the operating rod retention tab extends above the upper surface and is operable to be received in a groove formed in a receiver of an upper receiver.

Abstract: A firearm comprising: a frame having a barrel mount facility; the barrel mount facility having a barrel engagement portion and a threaded portion; a rear barrel portion having a rear end defining a chamber and configured to connect to the barrel engagement portion; the rear barrel portion having a front end having a first mating facility; a forward barrel portion having a rear end having a second mating facility configured to connect to the first interconnection facility; the forward barrel portion having a first retention facility proximate the rear end; an elongated barrel nut having a forward end with a second retention facility configured to bias the first retention facility in a rearward direction, the barrel nut having a rear end having nut threads configured to connect with the threaded portion of the frame.

Abstract: A launching system for an air gun includes a compression cylinder. The compression cylinder includes a cylinder body having an open rearward end and a closed forward end with an interior bore therebetween. The forward end has a transfer port configured for fluid communication with a barrel of an air gun. The piston includes a piston body. The piston body has a forward portion disposed within the interior bore. A sealing device is disposed on the forward portion of the piston body. One of a ferromagnetic section or magnet is disposed on a rearward portion of the piston body. A drive coil assembly is disposed over the one of a ferromagnetic section or magnet. When the drive coil assembly is energized with a first polarity, the piston is drawn from a reset position to a firing position relative to the compression cylinder by the drive coil assembly with increasing force.

Abstract: A firearm stock adjustment device for attachment to a firearm stock provides for a consistent, stable cheek weld and improves speed and consistency for an aimed shot. The device includes a thickness that fills and empty space between the maxilla and the front of the mandible with the firearm stock during a cheek weld and provides rest to the zygomatic arch and bone and pushes the firearm outward away from the jaw and tilts the head more vertically. This provides a quick and consistent sighting with the firearm when the cheek weld is performed and reperformed. The device is disposable, lightweight, cost effective, and comfortable and is universally attachable to common rifle stocks.

Abstract: A protective cover for a sighting device installed on a firearm includes a cover body configured to be couplable to the sighting device and having a rear vision opening; the sighting device having a top protrusion; wherein the cover body includes a top securing unit which is configured to be clipped on the top protrusion to tightly secure the cover body on the sighting device.

Abstract: User-zeroable adjustment knobs for an aiming device include a rotating member that is rotated to change a setting of the aiming device, a dial selectively couplable to the rotating member via a clutch for co-rotation therewith, and a locking mechanism that prevents the dial and rotating member from rotating relative to the aiming device when the locking mechanism is locked. The clutch is disengageable without the use of tools to allow the dial to rotate relative to the rotating member for zeroing the aiming device. The locking mechanism may include a lock release that is accessible from outside of the dial and movable relative to the dial and the rotating member to release the locking mechanism. Methods of zeroing locking adjustment knobs are also disclosed.

Abstract: A multi-position collapsible stock assembly including at least one extension rod, wherein the at least one extension rod includes an anti-rotation engagement portion formed proximate a first end of the extension rod, wherein a longitudinal arrangement of one or more spaced apart rod dimples/detents is longitudinally aligned along a plurality of areas of the at least one extension rod, wherein each longitudinal arrangement of one or more spaced apart rod dimples/detents corresponds to a discrete rotational position of the extension rod relative to the stock; and a stock having at least one anti-rotation engagement recess formed therein, wherein the anti-rotation engagement recess of the stock corresponds to the anti-rotation engagement portion such that engagement between the anti-rotation engagement recess and the anti-rotation engagement portion resists rotational movement of the extension rod relative to the stock.

Abstract: Methods and systems are disclosed for a weapon sight with a tapered housing. The housing may be configured to enclose an optical bench and/or a portion of an adjuster assembly within the weapon sight. The housing may include an outer shell, a first window, and a second window. The first window may define a first area. The second window may define a second area. The second area may be greater than the first area, for example, such that the outer shell is tapered outward from the first opening to the second opening. The outer shell may define a first wall and a second wall that extend between the first opening and the second opening on opposed sides of an optical path of the weapon sight. The first wall and the second wall may be slanted outward from the first window to the second window.

Abstract: Embodiments of the invention discussed herein surround cleaning of firearms which are configured to pass through internal aspects such as through a barrel and/or breach of a firearm. Included in some embodiments is a driver adaptor which is configured to allow the powered or mechanically assisted rotation of a cleaning system when inserted into the barrel or breach of a firearm for more rapid and efficient cleaning. Included in some embodiments is a barrel guard for the protection for the muzzle end of the barrel, the cleaning system, and the user.

Abstract: Stock adapters for firearms have a first adapter portion having a firearm interface configured to removably connect to the stock interface of the firearm, the first adapter portion having a quick detach first adapter interface, a second adapter portion having a stock interface configured to removably connect to the firearm interface of the stock, the second adapter portion having a quick detach second adapter interface configured to removably connect to the firearm interface of the stock, and the first and second adapter interfaces being removably joined in an abutting condition, and when in the abutting condition relatively rotatable between an unlocked condition in which the first and second adapter interfaces are axially separable, and a locked condition in which the first and second adapter interfaces are axially inseparable. The first and second adapter interfaces may be rotationally aligned to rotationally interface about the barrel axis.

Abstract: A cartridge that generates higher than typical chamber pressures has an enhanced means of primer retention for retaining the primer in the primer recess of the casing. The means may be a lip folded onto a conical surface, a annular groove to receive deformed primer wall portion material upon detonation, a concavity in the rearward facing wall of the primer, a check valve in the flash tube to inhibit propellant gases from reaching the primer recess, or specifically configured primers with a greater length than diameter and with greater wall thicknesses.

Abstract: A device for forming a secondary mount of a handguard on a firearm, wherein it is possible to bring the upper receiver of the firearm into a partially dismantled state from the lower receiver by tilting about a front takedown pin and/or into a dismantled state by removing (a pin), there being in the mounted state an elastic clamping connection between the handguard and the upper receiver and/or a barrel mount connected to the upper receiver, which barrel mount comprises at least one clamping element and at least one abutment, and the clamping element is designed such that when the handguard is connected or removed, an elastic deformation of at least one part of the clamping element takes place, and such that, in the mounted state, there is resilient prestressed contact with the abutment and/or at least partial accommodation in the abutment.

Abstract: A method for inserting a safety block into a rifle comprising upper and lower receivers, the lower receiver comprising a trigger assembly positioned within a cavity. The method includes separating the upper receiver and the lower receiver to expose the lower receiver and inserting the safety block into the cavity. The safety block comprises a hammer cavity that surrounds the trigger assembly such that the safety block surrounds at least a hammer of the trigger assembly. A hammer stop of the safety block rests against the hammer. The upper receiver is then closed against the lower receiver. Closing the upper receiver brings the upper receiver into contact with the safety block and rotationally pushes the hammer stop of the safety block forward and against the hammer. Rotating the safety block against the hammer rotates the hammer to free the hammer from a restraining portion of the trigger assembly.

Abstract: This disclosure describes systems, methods, and apparatus for a magazine assembly for a firearm, the magazine assembly comprising: an elongated housing, a spring positioned in an interior of the housing, a first and second plate at a proximal end of the housing, at least one follower configured to support one or more cartridges and move or slide within the housing based on a compression and decompression of the spring, one or more feed lips positioned at a distal end of the housing, the one or more feed lips adapted to prevent upward movement of a topmost of the one or more cartridges until a bolt or slide chambers the topmost of the one or more cartridges, and wherein the topmost cartridge is arranged off-center from the bolt of the firearm so as to increase an engagement or overlap between the bolt and the topmost cartridge.

Abstract: A projectile launcher includes: a storage and launching tube suitable for receiving a projectile; a breech sealing one end of the tube; a thruster arranged in the tube between the breech and the projectile, comprising a pressurized gas reserve and suitable for applying an ejection force to a projectile; a plug blocking the other end of the tube, having a locked configuration, in which the plug engages the internal wall of the tube so as to close the tube and to keep the projectile in the tube, and an unlocked configuration, in which the plug is free relative to the tube; and a trigger having a retracted resting configuration and a deployed configuration, suitable for triggering, causing the plug to pass from the locked configuration to the unlocked configuration; wherein the trigger is pneumatic and is supplied with pressure by the reserve.