A firearm as disclosures herein comprises a main receiver body, a barrel, a breech bolt structure, a buffer assembly, a trigger group assembly, a bolt catch and at least one of an auto-sear, a magazine adapter and a breech bolt anti-rotation structure. The main receiver body is preferably of a monolithic construction whereby the handguard and breech bolt carrying bore can be manufactured from a single piece of material. The auto-sear is tripped by engagement with a buffer of the buffer assembly. The magazine adapter has an exterior surface structure engaged with a mating interior surface structure of a magazine well space of the main receiver body. A distal end portion of the breech bolt anti-rotation structure is engageable by the buffer for limiting forward travel of the buffer when the barrel is detached from the main receiver body.

A propellant portioning device for a propellant formed from a plurality of individual propellant modules includes at least a first module holder, wherein the first module holder has at least one expandable holding element for holding one of the individual propellant modules. In an embodiment, the expandable holding element is expandable by a pressure of a fluid, wherein the fluid is introduced into an interior of the expandable holding element.

A multi-mode and/or multi-ammunition type weapon is described, whereupon being removed from a stored position is always initially in a default mode that fires one form of ammunition type, and can be quickly placed by a user into a different mode that fires a second, and different, form of ammunition type. When returned to the stored position, an integral ammunition type selector is automatically placed into an initial position enabling the weapon to fire one of the multiple ammunition types as selected by an integral ammunition sequence selector. The ammunition sequence selector enables selection of either the first or second form of ammunition type as the default ammunition type when the weapon is placed into the stored position. A shot sequence recorder is optionally included for recording sequences of ammunition types fired, providing an un-alterable record of firing events.

A multi-mode and/or multi-ammunition type weapon is described, whereupon being removed from a stored position is always initially in a default mode that fires one form of ammunition type, and can be quickly placed by a user into a different mode that fires a second, and different, form of ammunition type. When returned to the stored position, an integral ammunition type selector is automatically placed into an initial position enabling the weapon to fire one of the multiple ammunition types as selected by an integral ammunition sequence selector. The ammunition sequence selector enables selection of either the first or second form of ammunition type as the default ammunition type when the weapon is placed into the stored position. A shot sequence recorder is optionally included for recording sequences of ammunition types fired, providing an un-alterable record of firing events.

An ammunition body holding device that includes a holder for holding the ammunition body, in particular a projectile and/or a propellant, wherein the holder has at least one expandable holding element for holding the ammunition body.

A weapons system is comprised of a human transported weapon for firing a munition through a barrel aimed towards an identified target, a targeting subsystem, a decision subsystem, a weapons aim adjustment controller, and, a targeting subsystem for choosing, from up to a plurality of targets, one said target as a selected target in a field of view of the human transported weapon. The targeting subsystem chooses, from up to a plurality of targets, one said target as a selected target in a field of view of the human transported weapon. The decision subsystem compares where the selected target is located versus where the barrel is aimed. The weapons aim adjustment controller, adjusts aim of the barrel so that when fired, the munition will hit the selected target, responsive to the decision subsystem. The firing subsystem fires the munitions at the selected target at a first firing time responsive to the weapons aim adjustment controller. The munition is tracked after it is fired, to generate tracked munitions data. The selected target is tracked after the munitions is fired, to generate tracked target data.

An automated weapon system is comprised of a plurality of weapon subsystems; a targeting subsystem; a sensing subsystem; a decision subsystem; a device selection subsystem; and, trigger activation logic. The plurality of weapon subsystems each capable of firing a munition therefrom towards a respective selected target at a respective firing time. The targeting subsystem has a field of view in a target area and provides for identifying at least one said target in the field of view as a selected target. The sensing subsystem provides sensing of the selected target and tracking of location of the selected target through environment in the target area. The decision subsystem, determines where the selected target is located at a firing time responsive to the sensing subsystem. The device selection subsystem determines which of the plurality of weapon subsystems is the selected weapon subsystem in a best position for having munitions fired therefrom to strike the selected target. The trigger activation logic initiates firing of the munitions from the selected weapon subsystem at the firing time, so that the munition will hit the selected target.

A propellant portioning device for a propellant formed from a plurality of individual propellant modules includes at least a first module holder, wherein the first module holder has at least one expandable holding element for holding one of the individual propellant modules. In an embodiment, the expandable holding element is expandable by a pressure of a fluid, wherein the fluid is introduced into an interior of the expandable holding element.

A magazine for storing ammunition bodies having a plurality of adjacently arranged storage spaces, wherein a retaining apparatus for retaining an ammunition body is allocated of each of the storage spaces and wherein a convey device is provided for conveying an ammunition body from a retaining apparatus to an adjacent retaining apparatus. The disclosure furthermore relates to a method for storing ammunition bodies in a magazine.

A magazine for storing ammunition bodies having a plurality of adjacently arranged storage spaces, wherein a retaining apparatus for retaining an ammunition body is allocated of each of the storage spaces and wherein a convey device is provided for conveying an ammunition body from a retaining apparatus to an adjacent retaining apparatus. The disclosure furthermore relates to a method for storing ammunition bodies in a magazine.