A firearm cartridge ejector system is disclosed that may include a bolt or a bolt carrier group, and an ejector that may be configured to eject an ammunition cartridge from the firearm bolt or bolt carrier group. The ejector may further include a stem configured to engage an ejector spring, and an ejector face that may be reniform-shaped and attached to the stem and configured to engage and eject the ammunition cartridge.

A firearm includes a barrel having a breech end. A receiver is engaged with the breach end of the barrel and defines a chamber. A vent path is through the barrel downstream from the breech end. A latch is downstream from the vent path. A bolt is at least partially inside the chamber. The bolt has a locked position to prevent the bolt from moving away from the breech end of the barrel and a released position that allows the bolt to move away from said breech end of the barrel.

A breechblock for a weapon system having a recoilable barrel and having a breechblock carrier and a rotatable breechblock head. The breechblock head is carried by the breechblock carrier. The breechblock carrier has a control cam that is divided into a number of, preferably at least four, cam sections. The actual weapon function and the unlocking of the breechblock or of the breechblock head are combined in this control cam. The breechblock head comprises a control pin, which engages in the control cam and can be guided therein. Attached to the breechblock carrier are two blocking slides, which keep the breechblock head in one of two different positions, in which positions the breechblock head can enter or leave the locking portion of the barrel, namely, a forward position in the course of the actual functioning of the weapon and a rear position during the advancement of the returning masses.

A breechblock for a weapon system having a recoilable barrel and having a breechblock carrier and a rotatable breechblock head. The breechblock head is carried by the breechblock carrier. The breechblock carrier has a control cam that is divided into a number of, preferably at least four, cam sections. The actual weapon function and the unlocking of the breechblock or of the breechblock head are combined in this control cam. The breechblock head comprises a control pin, which engages in the control cam and can be guided therein. Attached to the breechblock carrier are two blocking slides, which keep the breechblock head in one of two different positions, in which positions the breechblock head can enter or leave the locking portion of the barrel, namely, a forward position in the course of the actual functioning of the weapon and a rear position during the advancement of the returning masses.

A magazine caseless weapon is disclosed and can be used for shooting using the caseless ammunition. The weapon includes a handguard or handguard with bipods, or gunstock, magazine, barrel, barrel latch, multifunctional cartridge, conical bushing of a receiver, the receiver, safety spring, safety, trigger guard with magazine box, trigger bar, trigger bar spring, magazine latch, axis, firing pin, spring of firing pin latch, firing pin latch, conical bushing of the bolt, bolt body, firing hammer, mainspring, mainspring latch, hunting or skeletal buttstock, threaded bushing for back plate screw, back plate or adjustable back plate, threaded bushing of bipods, cross screw, cross screw nut, upper screw, lower screw, caseless ammunition, dowel screw, dowel screw nut, latch of adjustable back plate, adjustable cheek piece, latch of adjustable cheek piece, stop, stop lock, threaded bushing of stop lock, lower part, upper part and screw of muzzle break, folding adjustable bipod, and bipod latch.

An assembly of a breech (1), a breech block (2) and an ejector (3) wherein the breech (1) is connected to the breech block (2) with the use of a groove (10), arranged in the breech block (2), and a corresponding recess, arranged in the breech (1). An ejector (3) is arranged in the breech (1) that is longitudinally adjustable in a sliding way between the front and rear end position. The ejector (3) is biased by a spring (6) against the shooting direction. On the back of the ejector (3) a recess is arranged that a peg (7) that protrudes from the breech (1) to reaches into. At the rear side of the ejector (3), a longitudinal pin (4) is arranged that fits into an opening (5) in the breech block (2) in the rear end position of the ejector (3). On the part of the ejector (3) that protrudes out of the breech (1), a stop surface (9) is arranged for bearing on the breech guide (11) that protrudes out of the breech (1) block.

A casing for an ammunition cartridge comprises a sleeve portion and a base portion. The casing may be two-piece, where the base portion is secured to the sleeve portion by means of a nipple having a flared end. The base portion comprises a cannelure that extends lengthwise from a flange. The cannelure, which is preferably curved, is deeper than a conventional cannelure and thus the casing weight is reduced. The cannelure has a step that is adjacent the flange, for limiting inward travel of the lip of a hook of the bolt of a firearm. Alternatively, a casing may be a one-piece casing, wherein the base and sleeve are integral.

Provided herein are extractors, bolt assemblies, firearms, and related methods, devices, and assemblies. A firearm extractor includes a first end, a second end opposite the first end, an axis defined between the first end and the second end, and a pivot portion between the first end and the second end. The extractor may include a notch defined at the inner side of the extractor at an axial location between the pivot portion and the first end that, in operation, engages a cartridge casing having a diameter greater than a casing of a 5.56 NATO cartridge or other platform-standard cartridge. A thickness of the extractor in at least one location defined at the axial location of the notch disposed radially inward of one or more lugs of a barrel or a barrel extension during cycling of the bolt may be greater than 0.019 inches.

Provided herein are extractors, bolt assemblies, firearms, and related methods, devices, and assemblies. A firearm extractor includes a first end, a second end opposite the first end, an axis defined between the first end and the second end, and a pivot portion between the first end and the second end. The extractor may include a notch defined at the inner side of the extractor at an axial location between the pivot portion and the first end that, in operation, engages a cartridge casing having a diameter greater than a casing of a 5.56 NATO cartridge or other platform-standard cartridge. A thickness of the extractor in at least one location defined at the axial location of the notch disposed radially inward of one or more lugs of a barrel or a barrel extension during cycling of the bolt may be greater than 0.019 inches.

An advanced gas piston operating system for Armalite Rifle (AR) and Armalite Rifle variants. The advanced gas piston system may include a barrel having a gas port formed through the barrel wall, a gas block assembly, a gas piston assembly, and upper receiver assembly, a sending block, rack and gear assembly, and a bolt carrier assembly with an attached rack. In such a system, a portion of the combustion gases from a fired projectile travel through a gas port in the barrel into a gas block assembly which drives a piston forward which compresses a main spring on an attached rod. The opposite end of the rod is attached to a sending block rack and gear assembly with the gear rotatably engaged with the teeth of another rack that is attached to the bolt carrier assembly. As the gas piston assembly moves forward, the bolt carrier assembly moves rearward until the main spring is fully compressed. Decompression of the main spring returns bolt carrier assembly forward loading the next round into the chamber.