Abstract: An accessory for a firearm includes a deflector structured to alter a path of discharge gasses and/or debris after such gasses and debris pass a Loaded Chamber Indicator (LCI) of the firearm. The LCI indicates a presence of a cartridge within a firing chamber of the firearm, but openings within and around the LCI also provide a path for hot gasses and debris to strike accessories, which causes fouling and other deterioration.

Abstract: A valve sleeve for a CT40-type cannon that functions in association with a detonation assembly to activate a firing pin. The valve sleeve incorporates a receiver to ensure the mechanical support of the cannon's firing pin during firing events, the firing pin being coupled to the valve sleeve and translatable in relation to it, the receiver being constituted by a cylindrical firing pin sleeve, a firing pin valve, and a firing pin assembly inserted in the substantially cylindrical sleeve and the firing pin being inserted both in the valve and in the firing pin assembly, this receiver being revolving.

Abstract: A compressed air gun trigger structure, the air refill lock cooperates with the trigger assembly to facility full auto and semi auto shooting. That is while the pressure of the eject chamber is lower than the set scale, the air refill lock will lock the piston even though the trigger is triggered by user. So the compressed air gun cannot be fired when the pressure is low. When the eject chamber is fully refilled and the pressure will push the air refill lock to releases the trigger and while user triggered the trigger, the compressed air gun is fired. That is the semi-auto mode. If the user keep holding the trigger, air refill lock will automatically trigger the piston for firing when the eject chamber is fully refilled. That is the full-auto mode.

Abstract: Firearms having threaded barrels with hidden threads. The barrel has a threaded portion disposed within the slide of the firearm when the firearm is in battery so that the muzzle end of the barrel is aligned with the muzzle end of the slide. The barrel is configured to couple with a barrel attachment, such as a thread protector, such that the coupling portion of the barrel attachment is disposed within the slide of the firearm when the firearm is in battery.

Abstract: A gas block for a firearm may include a quick release sling attachment. The sling attachment utilizes a pin that engages with a bore in the body of the gas block. The sling attachment features a ring that can be in a fixed position or can swivel.

Abstract: A novel rifling is disclosed, wherein a plurality of arc segments are disposed equally about the bore of a gun barrel, when viewed in cross-section. The surface of each arc segment comprises a bearing surface that imparts a spin on a projectile moving down a length of the gun barrel.

Abstract: A device for automatically discharging ammunition links obtained from a weapon configured to fire at a certain rate. The device includes a housing. The housing provides an inlet opening located in an upper position of the position for bulk insertion by gravity of the ammunition links obtained from the weapon after firing and an outlet opening for discharging the ammunition links toward an outside of the device at a given speed. The outlet opening is arranged laterally or offset relative to a vertical of the inlet opening. The device further includes a proximal ramp of the inlet opening connected to a proximal horizontal planar path of the outlet opening, two channeling rollers with parallel axes and inverse rotation relative to one another located at the proximal ramp, and two propulsion and guiding rollers located on either side of the proximal horizontal planar path.

Abstract: A firearm includes a quick-change barrel including: (a) at least two barrel-mounting features, each configured to selectively interact with a barrel-receipt feature of the firearm during mounting of the quick-change barrel to a mounting structure of the firearm, or (b) at least one barrel-mounting feature configured to selectively interact with at least two barrel-receipt features of the firearm during mounting of the quick-change barrel to a mounting structure of the firearm. The barrel is selectively mountable to the firearm in at least two orientations depending, per (a), upon which of the at least two barrel-mounting features interact with the barrel-receipt feature or, per (b), upon which of the at least two barrel-receipt fixtures interact with the barrel-mounting fixture.

Abstract: A firearm system is provided. A pump-action firearm, such as a shotgun, includes a buffer attached to a trigger housing. The buffer consists of a resilient or semi-resilient material and is positioned such as to face towards an opening the receiver in which the magazine tube is partially received. The buffer includes a contoured bottom surface and an upper surface, configured in a way which shortens the space available within an opening of a receiver while accommodating the loading of shells into a magazine tube. Upon moving a shell into the opening, such as by pumping the action, the shell impacts the buffer, which stabilizes the shell prior to being lifted by an elevators. For shorter shells, this reduces the risk of a jamming event. For longer shells, the buffer is configured to compress to accommodate the additional length.

Abstract: The invention provides an apparatus and method for preventing surrounding loose rock fragments from falling or collapsing into a blast hole. The apparatus includes a flexible sheet including a pair of spaced apart longitudinally extending side edges and a pair of spaced apart laterally extending end edges. The sheet has a curved form defining a longitudinal passage extending between openings at longitudinally opposite ends, one end of the curved sheet being insertable into the open end of a blast hole whereby the curved sheet closely faces an internal surface of the blast hole and forms a barrier preventing surrounding loose rock fragments from falling or collapsing into the open end of the blast hole. The invention also provides a bench blasting method and a deployment device for deploying the apparatus into a blast hole.

Abstract: A damper system for a pyrotechnic time delay may comprise: a firing pin; a moveable housing defining a chamber therein; a fixed piston comprising a piston head disposed in the chamber, a first rod extending from the piston head axially outward of the moveable housing, and a second rod configured to fixedly couple to a housing; a first spring extending axially from the moveable housing to the firing pin; and a second spring extending axially from the moveable housing to the firing pin.

Abstract: An airgun has a high pressure reservoir for providing a pressurized motive gas to a breech to fire a projectile. A regulator is intermediate the high pressure reservoir and a downstream firing pressure reservoir for providing a consistent regulated pressure of the motive gas in the firing pressure reservoir. The airgun includes a bypass line for selectively connecting the high pressure reservoir to the firing pressure reservoir, independently of the regulator. Thus, an operator can select a firing of the airgun with either a regulated gas pressure in the firing reservoir or the pressure of the high pressure reservoir.

Abstract: An improved gas piston system for the automatic loading of a rifle, especially a rifle of the M-16/AR-15 type. The system employs a barrel nut, or an adaptor to a barrel nut, that has been modified to secure one end of a gas piston system. The other end of the gas piston system, namely the piston rod, engages, either directly or indirectly, the key on a bolt carrier group. This configuration positions the gas piston system at a point starting near the barrel nut and extending to the bolt carrier group of the rifle, while a gas tube extends from the gas block to the gas piston system a point near the barrel nut.

Abstract: A method for actuating a device, the method including: biasing a first movable member in a first direction; biasing a second movable member in a second direction; blocking a movement of the second movable member at a position along a second path when the first and second movable members experience a first acceleration having a first magnitude and a first duration; and allowing the second movable member to move along the second path past the position when the first and second movable members experience a second acceleration having a second magnitude and a second duration, the second magnitude being less than the first magnitude and the second duration being greater than the first duration.

Abstract: A system includes a movable assembly configured for pushing a piece of ammunition into a breech ring of a firearm and/or closing the breech ring, under control of a motor. A feeding device is configured for feeding the piece of ammunition into a position situated between the movable assembly and the breech ring. A synchronization device co-operates with the motor on one side and with the feeding device on the other side. The synchronization mechanism provides for selective transmission of motion, under control of the movable assembly, from the motor to the feeding mechanism, when the movable assembly is in a position away from the breech ring.

Abstract: A pellet having a convex shaped front includes a plurality of radially disposed surface slots. The concave shaped rear portion has a matching number of surface ribs that can be frictionally attached to the convex portion's slots. The pellet is constructed of a combination of medical compounds along with appropriate binders and other compounds that are pressed together under high pressure to produce a rigid mass capable of being propelled at high speeds and to pierce the skin of an animal or person where the compounds can be dissolved when contacting the internal liquid portion of the animal or person. The pellet can be loaded and propelled by a standard air rifle, gun, or pistol.

Abstract: Suppressors and baffles therein provide for sound and/or flash suppression of a firearm. The baffles include a first cone portion, a second cone portion, and a neck connecting the first cone portion and the second cone portion. The first cone portion and second cone portion define a passageway through which hot gases and a bullet may be expelled through and out of the suppressor. The first cone portion directs at least some expelled gases around the outer edge of the first cone portion and to the neck and second cone portion. The second cone portion together with a suppressor body block movement of the expelled gases. A port in the neck allows the expelled gases blocked by the second cone portion to escape toward the passageway to disrupt the flow of the expelled gases and thereby further suppress the sound and/or flash.

Abstract: A mat assembly including a planar mat body formed to cover a preselected area of a surface region. The preselected area partially defines a volume of ground to be broken by explosion therein. The mat body includes one or more layer elements. The mat body has an engagement surface for engagement with the preselected area. The mat assembly includes a skirt element connected with the mat body having an external portion extending from the mat body, for at least partially restraining matter ejected from the volume of ground upon initiation of the explosion.

Abstract: Apparatus and associated methods relate to a handgun brace arranged with a rigid structure extending radially away from a handgun trigger guard, and having a forward-facing surface configured to physically engage with at least one finger of a user's non-primary grip hand in a stable position below the handgun's barrel and in front of the handgun's trigger, such that a counter-force applied by the finger(s) at the forward-facing surface tends to prevent the handgun (especially the muzzle), from rising or rotating in response to shooting, such as due to muzzle jump. In an illustrative example, the brace may be releasably fixed to the handgun (e.g., as a modular handgun accessory). A handgun brace that substantially mitigates the unwanted effects of muzzle jump/recoil may advantageously yield higher shooting accuracy and beneficially promote proper handgun grip positioning.

Abstract: The present invention relates to a barrel sleeve assembly for a rifle. The barrel sleeve assembly includes a rifle barrel and a sleeve. The rifle barrel has a portion that has been turned down from standard sizes. The sleeve is fitted over the turned down portion of the rifle barrel.