An ammunition cartridge casing has a casing base with a proximal end surface, a casing body defining an inside volume, and a distal end portion. The casing base defines a primer pocket in communication with the inside volume of the casing body, where the primer pocket is sized and configured such that when a primer is installed in the primer pocket, a proximal face of the primer is recessed into the base at least 0.010" with respect to the end surface. Blank ammunition made with the cartridge casing is configured for use with a rifle having a bolt with a boss on the breech face that corresponds to the recessed primer.
A suppressor baffle has a baffle body having an annular shape and extending axially along a central axis from a proximal end to a distal end. A tapered wall expands in size moving distally along the central axis. The tapered wall defines a projectile opening at a proximal end and connects at a distal end to the baffle body. Vanes on an outside of the tapered wall are arranged to provide a tightening torque in response to combustion gases flowing axially and colliding with the suppressor baffle. The suppressor baffle can be arranged as a blast baffle in a baffle stack or part of a suppressor assembly.
A suppressor baffle includes a cone portion expanding along a central axis from a proximal end defining a projectile opening to an open distal end having an outer rim. The projectile opening is in an entrance plane oriented obliquely to the central axis. A first volume between a first side of the cone portion and a central plane that includes the central axis is smaller than a second volume between an opposite second side of the cone portion and the central plane. At least part of the outer surface of the second side of the cone portion has a convex profile as viewed along the central plane from a side of the suppressor baffle. In another example, a first part of the cone is axially offset from an opposite second part of the cone, resulting in a curved projectile opening profile and a curved outer rim profile.
A riflescope that stores several grouped ballistics data includes a reticle having individually addressable indicators, a memory that stores two or more stored sets of ballistics data, where each set of ballistics data is mapped to a respective set of indicators of the reticle, a selector configured to choose one of the stored sets of ballistics data as an active set of ballistics data, and a driver structured to energize only those indicators of the plurality of indicators that are mapped to the active set of ballistics data. Methods of selecting an active group of ballistics data are also described.
A method of pairing a device and a single one of two or more potential pairing devices includes first setting the device in a seek mode and scanning for the potential pairing devices. A list is stored in the device that includes any potential pairing devices discovered while in the seek mode. The list is stored in a sequential order based on a signal strength between the device and each of the discovered potential pairing devices. Then the device determines whether any of the potential pairing devices in the list are set in a predetermined mode, and pairs with the one of the potential pairing devices in the predetermined mode that has the highest signal strength.
A target dot sight includes a target illumination sensor that senses the amount of illumination at a target, rather than merely sensing the ambient sight of the entire operating environment. Then, based on the sensed target illumination, the target dot sight may automatically compensate for the brightness of the target.
A receiver assembly for a rifle includes a receiver with a feed assembly configured for open-bolt operation. A feed cover is hingedly mounted to the receiver and includes one or more components of the feed assembly, where the feed cover is movable between a closed position and an open position by pivoting about a hinge pin oriented along a longitudinal axis of the receiver. For example, the feed cover can pivot to one side of the receiver when in the open position. A rifle incorporating the receiver assembly is also disclosed.
F41A 3/26 - Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable bolt
F41A 3/64 - Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
F41A 3/68 - Bolt stops, i.e. means for limiting bolt opening movement
F41A 3/94 - Fluid buffers in combination with spring buffers
F41A 5/02 - Mechanisms or systems operated by propellant charge energy for automatically opening the lock recoil-operated
F41A 5/18 - Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated
F41A 5/26 - Arrangements or systems for bleeding the gas from the barrel
F41A 5/32 - Energy accumulator systems, i.e. systems for opening the breech-block by energy accumulated during barrel or gas piston recoil
F41A 9/32 - Reciprocating-slide-type belt transporters
F41A 9/55 - Fixed guiding means, mounted on, or near, the cartridge chamber
F41A 15/14 - Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun for bolt-action guns the ejector being mounted on, or within, the bolt
F41A 19/13 - Percussion or firing pins, i.e. fixed or slidably- mounted striker elements; Mountings therefor
F41A 19/26 - Mechanical firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin and the breech-block or bolt forming one piece
F41A 19/27 - Mechanical firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block
A recoil assembly for a rifle includes a barrel assembly, a bolt, bolt actuator, and a buffer assembly. The barrel assembly includes a barrel secured to a barrel extension. The barrel assembly is configured to be movably received through the fore end of the upper receiver and to move axially relative to the upper receiver when the rifle is fired. The barrel extension is coupled to a hydraulic buffer assembly located below the barrel extension and counteracts recoil forces acting on the barrel extension when the rifle is fired. A recoil spring is coupled to an op rod extending from a gas piston assembly on the barrel. The recoil spring counteracts recoil forces acting the bolt actuator when the rifle is fired.
F41A 3/26 - Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable bolt
A detachable box magazine for firearms includes a hollow magazine tube extending longitudinally along a median plane. The magazine tube defines a single-stack portion extending to an upper tube end with an upper tube opening. The magazine tube defines a double-stack portion positioned below the single-stack portion and extending to a bottom tube end with a bottom tube opening. For example, opposite lateral margins of the front sidewall can have a stepped shape between the upper tube end and the double-stack portion. The rear sidewall can have a linear taper between the upper tube end and the double-stack portion.
An actuation system includes a bolt carrier assembly configured for use within a firearm, the bolt carrier assembly including a firing pin configured for striking a chambered round. A hammer assembly is configured for striking the firing pin of the bolt carrier assembly. An auto sear assembly is configured to actuate the hammer assembly during operation of the firearm. A linkage assembly is configured to couple the bolt carrier assembly and the auto sear assembly and effectuate the auto sear assembly actuating the hammer assembly.
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