Abstract: A magazine for rimmed cartridges includes a magazine tube having first left and right ribs on an inside of the magazine tube extend inward from a forward portion of opposite sidewalls and are laterally spaced by a first spacing. Second left and right ribs on an inside of the magazine tube extend inward from a rear portion of opposite sidewalls and are laterally spaced by a second spacing that is greater than the first spacing. When the magazine is filled to capacity with rimmed cartridges, cartridges in the magazine are arranged in two offset columns with projectiles of the rimmed cartridges laterally spaced from a median plane by a first distance and rims of the rimmed cartridges laterally spaced from the median plane by a second distance that is greater than the first distance. Also disclosed is a baseplate that attaches to a magazine tube using a snap fit.

Abstract: The present disclosure provides charging handles compatible with hold-open bolt carriers for using low-cost (e.g., 22LR) ammunition in a standard AR-15 or M16 upper receiver, such as an upper receiver of a Sig Sauer MCX firearm.

Abstract: An airbag inflator includes a pressure vessel, an initiator positioned at one end of the pressure vessel, a manifold positioned at an opposite end of the pressure vessel, and a generant holder assembly secured in the pressure vessel adjacent the initiator. The generant holder assembly defines an annular space that is configured to secure a generant. A center of the generant holder assembly is open. The open center allows a pressure wave from the initiator to travel to the outlet burst disk.

Abstract: Various embodiments are directed to ambidextrous firearm controls, including an ambidextrous bolt control assembly and/or ambidextrous magazine release and associated methods. The ambidextrous bolt control assembly may include a bolt catch configured to hingedly connect to a firearm to rotate between a disengaged position and an engaged position, the bolt catch may include a first bolt catch engagement button operable from a first side of the firearm and a first bolt catch release button operable from the first side of the firearm; an ambidextrous bolt catch engagement button operable from a second side of the firearm; and an ambidextrous bolt catch release button operable from the second side of the firearm; wherein the ambidextrous bolt catch engagement button and the ambidextrous bolt catch release button may each be separately movable relative to the firearm. The ambidextrous bolt catch assembly may further include an ambidextrous magazine release assembly.

Abstract: In some embodiments, a fire control mechanism comprises a frame comprising a flange comprising a peak. A hammer is arranged to pivot about a hammer axis. A hammer spring is arranged to bias the hammer about the hammer axis. The hammer spring contacts the peak of the flange.

Abstract: A dart launcher having few but integral parts and an assembly process that is quick and easy for forming robust but inexpensive toys. The launcher may have an outer body, a safety valve and spring, a valve cap, a trigger, a piston, a launch spring, a cylinder cap and a plunger rod. The outer body includes an integral cylinder portion, a barrel portion and a trigger-mounting portion, the trigger includes an integral finger pad portion, a latch arm, a biasing portion and resilient legs. The piston includes an opening and a connector component formed around the opening to snap-fit with the piston, the cylinder cap includes an opening for the plunger rod and a connector component to connect with the cylinder portion, and the barrel portion includes a valve and mandrel support for supporting the safety valve and spring.

Abstract: An end plate for a perforating gun assembly. The end plate has a first end defining a first face, and a second end opposite the first end defining a second face. A flange resides between the first face and the second face. The end plate has a first through-opening and a second through-opening. A first bulkhead resides in the first through-opening, and is configured to closely receive a signal transmission pin. A second bulkhead resides in the second through-opening and is configured to closely receive a detonator pin. The signal transmission pin transmits detonation signals through the end plate, while the detonator pin transmits detonation signals back up the wellbore and through the end plate. The end plate may also have an opening along the second face for receiving a ground pin.

Abstract: Digital Recording is provided using SWO technology wherein a microprocessor is located in a pistol and a single wire EEPROM is mounted on each cartridge used by the pistol. Power and data can be sent over a single wire from the microprocessor to the single wire EEPROM to communicate information about the pistol, such as the serial number, make, and model of the firearm.

Abstract: Bridged bulkheads for a perforating gun assembly. The bridged bulkheads comprise a first bulkhead, a signal transmission pin residing within the first bulkhead, a second bulkhead, a detonator pin residing within the second bulkhead, and a bridge fixedly connecting and spacing apart the first bulkhead and the second bulkhead. Each of the bulkheads is fabricated from an electrically non-conductive material, while each of the pins is an electrically conductive pin. The bridge comprises a body connected to the first and second bulkheads. A signal transmission wire is connected to the signal transmission pin at the first end of the first bulkhead. At the same time, a detonator wire is connected to the detonator pin at the first end of the second bulkhead. The first bulkhead is over-molded to hold the signal transmission wire, while the second bulkhead is over-molded to securely hold the detonator wire.

Abstract: A blast countermeasure for a vehicle, such as an armoured vehicle, is provided. The blast countermeasure comprises: at least one explosive; a detonator for detonating the explosive; and at least one reflector, located at least partially above the at least one explosive, for reflecting a shock wave generated by detonation of the at least one explosive groundwards in order to apply a groundwards force to the vehicle. The vehicle may comprise: control circuitry configured to respond to detection of an explosion local to the vehicle by activating an actuator to generate a groundwards force and cause a cabin floor of the vehicle to move groundwards.

Abstract: A sight includes a main body, an erecting unit and a compensating mechanism. The compensating mechanism includes a fixing unit, a cover and an switching unit. A compensating mechanism for a sight includes a base unit, a transmission unit, an adjusting cap, a movable unit and a lock unit. The adjusting cap is located in a first position when the adjusting cap is locked by the lock unit. The adjusting cap in the first position can be rotated in a second direction or in a third direction opposite to the second direction when the lock unit is moved in a first direction to release the adjusting cap. The adjusting cap stops in a second position when the adjusting cap is rotated in the third direction so that the movable unit is propped against an end of a groove of the adjusting cap.

Abstract: An interchangeable element attachment system, including at least some of a bolt catch, wherein an attachment aperture is formed through a portion of an upper button portion of the bolt catch; an assist lever, wherein one or more attachment aperture engaging projections extend from a portion of an assist lever second side, within an attachment portion of the assist lever, wherein a portion of the attachment aperture engaging projection is received within at least a portion of the attachment aperture of the bolt catch, such that one or more portions of the attachment aperture engaging projection are abutted against one or more corresponding portions of the attachment aperture, and wherein an at least partially internally threaded fastener recess extends within the attachment portion; and a fastener positionable through the aligned attachment aperture and fastener recess to assist in attaching or coupling the assist lever to the bolt catch.

Abstract: A firearm recoil mechanism is provided that includes a front spring plate integrally coupled with a Bolt Carrier Group. The front spring plate is slidably coupled with first and Second Guide Rods, where the first and Second Guide Rods extend through apertures in the front spring plate, first and second Recoil Springs engaging with the front spring plate, where the first Recoil Spring is disposed around the first Guide Rod, and where second Recoil Spring is disposed around the Second Guide Rod. A piston integrally coupled with the front spring plate and the Bolt Carrier Group. The piston and the front spring plate move with the Bolt Carrier Group in opposing directions while the first and Second Guide Rods remain stationary to coil and recoil the first Recoil Spring and second Recoil Spring on the first and Second Guide Rods, respectively.

Abstract: A sealing member configured to fill the gap between a charging handle and an lower receiver. The sealing member may be disposed in a charging handle that forms a seal against the receiver to prevent the escape of discharge gas from the interface between the charging handle and the receiver. The sealing member may be disposed on the top surface of the lower receiver at the charging handle-lower receiver interface.

Abstract: A firearms cartridge is provided which is equipped with a signal receiver. The signal receiver is operable to disable the firearm when it received a predetermined signal, such as a signal on the electromagnetic spectrum, acoustic signal, and the like. When the signal is not present, the firearm cartridge works like a traditional unrestricted firearm cartridge allowing a firing of the weapon.

Abstract: A firearm cartridge case includes a cartridge case having a base which defines a cartridge case diameter; and a rebated rim which defines a rim diameter less than the cartridge case diameter, a ratio of the cartridge case diameter to the rim diameter is between 1.03-1.10.

Abstract: A conducted electrical weapon may interchangeably receive a plurality of magazines. A magazine may be releasably engaged with a magazine bay of the conducted electrical weapon. Engagement of a magazine with the magazine bay may expose a bottom surface of the magazine. Each magazine may comprise a plurality of firing tubes. A magazine may be configured to launch at least one electrode from at least one firing tube of the plurality of firing tubes. A control circuit may be configured to provide an ignition signal to less than all of the plurality of firing tubes. A first pair of firing tubes may be oriented to achieve a minimum electrode spread at a first range. A second pair of firing tubes may be oriented to achieve a minimum electrode spread at a second range. The plurality of firing tubes may be arranged in an array comprising a column of firing tubes.

Abstract: A sighting device, such as a gunsight, includes a support. The support includes a surface. The surface has a surface first section and a surface second section. The surface second section forms a curve. A hollow is delimited by the support surface. An access into the hollow is delimited by the support surface. An elongate light collector has a first section connected to a curved second section. The collector further includes a terminal connected to the second section. Also an illuminating surface of the collector resides at the first section. The light collector first section lies on and along the surface first section. The light collector second section lies on and along said curve of the second section. A light generating source resides in the hollow.

Abstract: A modular system for preventing the unauthorized use of a firearm is provided. The system includes a safety module that is configured to attach to a firearm using a standard rail mount found on most firearms. The safety module includes a trigger bar that is configured to extend from the safety module to behind or through the side of the trigger of the firearm. The safety module further includes a locking mechanism that, in a first state, prevents the trigger bar from moving rearward and thereby also prevents the trigger from being pulled. The locking mechanism further includes a second state where the trigger bar is allowed to move with the trigger thereby allowing the trigger to be pulled.

Abstract: A single-use magazine for a firearm. The disposable magazine for a firearm has a first portion and a second portion. The first portion comprises receiving members and the second portion comprises locking members. The first portion is configured to be permanently locked to the second portion via the receiving members and the locking members. A cavity formed between the first portion and the second portion comprises a plurality of bullets. The disposable magazine is configured for one-time use.