Abstract: The present disclosure is directed to firearms that can receive and fire bullets from ammunition with different cartridge case sizes. For example, the receiver may fire a bullet from either a short cartridge, a medium cartridge, or long cartridge after the short, medium, or long cartridge is received by a receiver of the firearm. This firearm may include a receiver portion and a bolt portion that lock together at different relative locations when cartridges of different lengths are received by the receiver portion. The receiver portion may include a first type of alignment retention features (e.g. protrusions) and the bolt portion may include a second type of alignment retention features (e.g. recessions). Once a firearm cartridge is located inside of the firearm, it may be fired based on the receiver and the bolt portions being locked together via physical engagement of the different types of alignment retention features.

Abstract: A handle for use with a firearm cleaning rod may include an ergonomic handle. The ergonomic handle comprises a core having a top end, a grip, and a base; a bolster disposed on the top end provides an additional point for a user to apply force to the cleaning rod when cleaning a firearm. Below the bolster is the grip, which consists of a palm-engaging section and a finger-engaging section, where an inward curvature exists on the palm-engaging surface below the bolster; both sections may be covered with a textured overall for improved gripping by a user. Within the base is a housing that contains a connector for the purpose of securely connecting a cleaning rod to the ergonomic handle. The cleaning rod may include an accessory end for connecting firearm barrel cleaning accessories.

Abstract: Bismuth-based firearm projectiles, optionally firearm cartridges containing the same, and methods for forming bismuth-tin-copper alloys or bismuth-nickel alloys and bismuth-based firearm projectiles are disclosed herein. The bismuth-based firearm projectiles include a projectile body comprising a bismuth-tin-copper alloy or bismuth-nickel alloy that forms at least 90 wt % of the projectile body.

Abstract: A firearm accessory is rotatable on two axes through the use of a sleeve mounted on a bearing comprising of a first part and a second part the second part being rotatable and coupled to the first part facilitating a central opening and a first rotational motion and protrusions with at least one hinge from the sleeve attaching to a mirror device acting as a second rotational motion. An alternative teaches digital control of a swinging mirror assembly having spring acting ball actuators providing the digital action between the actuators and a surface. In another alternative, two armatures also are taught that connect a reflective device to a bearing mounted sleeve in front of or behind a target viewing device. Any of these may be directly rail mounted with appropriate attachment devices or directly connected to or manufactured as an integral part of a reflex sight, night vision, scope or similar viewing system of a firearm.

Abstract: A double impact bullet with internal hammer and stabilization post.

Abstract: A gas piston according to various aspects of the present technology comprises a helical groove disposed along an exterior surface. The helical groove may comprise curved edges at transitions between a crest and root of the helical groove. The helical groove allows for easier movement of the gas piston within its operating cylinder, provides enhanced resistance to particulate build up, and improves firing accuracy.

Abstract: A firing head configured to initiate the firing of an element in a perforating gun. The firing head includes an insert having a bore extending along a longitudinal direction X; a percussion detonator facing the bore and including an explosive material that is configured to detonate; a firing pin located partially in the bore; and a retention mechanism located on the firing pin and preventing the firing pin to move along the longitudinal direction X into the bore. The retention mechanism includes a degradable material that is configured to chemically react with a well fluid so that the retention mechanism degrades until freeing the firing pin so that the firing pin moves along the longitudinal direction X into the bore and strikes the percussion detonator.

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; and tempering the cartridge case. The cartridge case is fabricated of boron steel including ?1.0% boron.

Abstract: An illumination device for a firearm may include a housing supporting multiple lamps. A switch actuator of the device is rotationally coupled to a rear end of the housing. A cam is coupled to the switch actuator, such that the cam rotates with the actuator, the cam having a first end including a magnet and a second end having a shaped cam surface configured to interface with a cam follower. The actuator and the cam are biased toward a neutral position. Selective rotation of the cam causes a magnet of the cam to operate one or more magnetic switches. The cam is transitionable between a plurality of discrete positions, e.g., including a pair of toggle positions in the first rotational direction from the neutral position, and a pair of momentary positions disposed on the cam in the second rotational direction from the neutral position.

Abstract: The present invention provides a projectile device and a method of manufacture of a projectile device and in particular to a pistol bullet and a rifle bullet and method of manufacture of the same. In one embodiment, the projectile apparatus has a cylindrical body portion having a diameter, a front nose section tapering from a most proximal point of the projectile to the cylindrical body portion, and a rear tail section connected to the body portion and extending to the most distal point of the projectile, in which the front nose portion comprises a plurality of twisting depressions forming troughs.

Abstract: The present application provides a handheld intelligent electronic fountain device, comprising a housing, a storage bin for storing consumables, a heating component for heating consumables, an ejection tube for ejecting consumables outward, and an air supply component for delivering compressed air into the ejection tube, so as to prompt consumables to be ejected out of the ejection tube. The present application provides a first material guiding tube and a first rotating shalt, a first threaded portion for guiding material is provided at one end of the first rotating shaft, and a second threaded portion is provided at other end of the first rotating shaft, and the second threaded portion is threadedly connected with a first transmission gear.

Abstract: A low energy cartridge has a case having a sidewall with an interior surface defining a projectile receptacle along a bore axis and having a forward open case mouth, a projectile having an exterior sidewall closely received in the projectile receptacle and defining a rotational axis, a propellant receptacle defined by the case and having a passage communicating with the projectile receptacle, the projectile exterior sidewall being non-circular in cross section across the rotational axis, and the case sidewall interior surface having a rotational engagement feature configured to rotationally engage the non-circular projectile exterior sidewall. The projectile may be slidably received in the projectile receptacle for propulsion from the forward open case mouth. At least one of the projectile and the sidewall interior surface may have a helical surface feature, such that spin is imparted to the projectile upon propulsion from the case.

Abstract: A safety apparatus for a grenade launcher assembly which provides a dual-way ammunition feed, recognizes the direction automatically without the importance of which direction the user opens the handle in order to prevent the direction selector or movement from reversing and which does not permit opening to the other unselected side for the filling-off phase.

Abstract: A rifle support comprises a leash with a loop end, an opposed free end, and an intermediate portion. The leash has a width and a plurality of spaced apart stoppers sized larger than this width. A hook comprises a suspension panel portion and a support portion offset from the suspension panel portion. The support portion includes an upward facing support surface when the suspension portion is vertical. The suspension panel has an elongated side edge and an upper end and a slot entering at the side edge. The slot width is greater that the leash but smaller than the stopper so as to admit the leash while denying passage of the stopper. The leash may be girded around a tree with its intermediate portion passing through the loop and the free end depending downward, with the hook slot receiving the leash and stopped a stopper.

Abstract: An operating system for a firearm includes a trigger, a hammer, a disconnector, a pivoting arm, and a lower member. The trigger includes a lower portion, an upper portion, and a trigger pivot. The disconnector includes a lower portion, an upper portion, and a disconnector pivot. The pivoting arm includes a forward protrusion, a pivoting arm opening, and a pin extending through the pivoting arm opening. The lower member includes a lower member opening and a pin hole that is coaxial with the trigger pivot and the disconnector pivot. At least a portion of the trigger and at least a portion of the disconnector are disposed within the lower member opening. Motion of the trigger causes the forward protrusion of the pivoting arm to engage a bolt carrier group and hold the bolt carrier group in an open position.

Abstract: Devices and methods for chambering and releasing a high pressure cartridge case from a firearm. In some embodiments, a static chamber insert of high elastic modulus is disclosed. In some embodiments, a dynamic or adaptable chamber insert that radially expands in an out-of-battery configuration and radially contracts in a battery configuration is disclosed.

Abstract: Devices and methods for an 8 mm semiautomatic handgun cartridge providing a reduced form factor for carrying a greater number of rounds in a smaller space while maintaining ballistic performance.

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.

Abstract: Devices and methods for an 8 mm or .32 caliber semiautomatic handgun cartridge providing a reduced form factor for carrying a greater number of rounds in a smaller space while maintaining ballistic performance.

Abstract: An assembly comprising a firearm slide and an adaptor plate configured to mate with the firearm slide. The adapter plate includes a first seat in a top surface of the adaptor plate and a second seat in the top surface of the adaptor plate. The assembly also includes a first iron sight configured to mate with the first seat and a second iron sight configured to mate with the second seat.