A rotating bolt firearm may be configured to fire a .308 cartridge. However, the firearm may have a reduced weight in comparison to standard .308 rifles. The firearm may have many components typically used in a .223 rifle. The firearm may include a barrel extension with an extractor gap, which allows a .308 bolt to fit within a .223 sized barrel extension. The firearm may comprise an elongated magazine well in comparison to a .223 mil-spec rifle. The firearm may weigh less than 6.8 pounds with a 16 inch barrel, or less than 6.3 pounds with a 10.5 inch barrel.

A chassis for a firearm includes a lower receiver and a lower forend that are monolithically formed with one another. The lower receiver defines a trigger well that is configured to receive an action. The lower forend extends distally from the lower receiver and defines a channel that is configured to receive a barrel.

Disclosed is an autoloading shotgun firearm which shares interchangeable fully compatible modular sub-assemblies, ergonomics, parts commonality, and exterior appearance with the AR rifle platform. Rapidly reversible tool less conversion from rifle to shotgun and vice versa is accomplished by substitution of the AR rifle upper receiver and ammunition detachable magazine with fully compatible shotgun upper receiver and ammunition detachable magazine. Said shotgun utilizes standard rimmed shotgun ammunition via features in the detachable magazine which securely maintain the position and facilitate the feeding of the cartridges during normal operation. No alteration of the AR rifle lower receiver is required. A short-recoil action is integrated into the shotgun upper receiver. The external appearance and functionality of the AR rifle are retained while eliminating the complexity and inherent fouling issues of typical gas systems used in the AR rifle. A short-recoil action also enables the shotgun to function reliably with shorter length barrels.

Disclosed is an autoloading shotgun firearm which shares interchangeable fully compatible modular sub-assemblies, ergonomics, parts commonality, and exterior appearance with the AR rifle platform. Rapidly reversible tool less conversion from rifle to shotgun and vice versa is accomplished by substitution of the AR rifle upper receiver and ammunition detachable magazine with fully compatible shotgun upper receiver and ammunition detachable magazine. Said shotgun utilizes standard rimmed shotgun ammunition via features in the detachable magazine which securely maintain the position and facilitate the feeding of the cartridges during normal operation. No alteration of the AR rifle lower receiver is required. A short-recoil action is integrated into the shotgun upper receiver. The external appearance and functionality of the AR rifle are retained while eliminating the complexity and inherent fouling issues of typical gas systems used in the AR rifle. A short-recoil action also enables the shotgun to function reliably with shorter length barrels.

The disclosure relates to firearms, and more particularly to a caseless weapon for magazine, semi-automatic and automatic shot. The disclosed weapon includes: a removable adjustable front sight, a removable adjustable dioptrical sight, a forward grip, a gunstock, a magazine, a receiver cover, a cocking lever, a bolt carrier, a rod, a percussion piston, a shutter housing, a safety catch of the firing percussion, a balancing gear, a barrel, a barrel latch, a multifunctional cartridge, a conical bushing of receiver, an extractor, a receiver, a big front nut, a front swivel, a magazine latch, a magazine latch pusher, a safety latch, a safety catch, a trigger bar, a bracket of the percussion mechanism, a cocking piece, a multifunction latch lever, a stop of the multifunction latch, a lock pin splint, a latch of the ramrod, a spring of the latch of ramrod, a ramrod, a caseless ammunition.

The disclosure relates to firearms, and more particularly to a caseless weapon for magazine, semi-automatic and automatic shot. The disclosed weapon includes: a removable adjustable front sight, a removable adjustable dioptrical sight, a forward grip, a gunstock, a magazine, a receiver cover, a cocking lever, a bolt carrier, a rod, a percussion piston, a shutter housing, a safety catch of the firing percussion, a balancing gear, a barrel, a barrel latch, a multifunctional cartridge, a conical bushing of receiver, an extractor, a receiver, a big front nut, a front swivel, a magazine latch, a magazine latch pusher, a safety latch, a safety catch, a trigger bar, a bracket of the percussion mechanism, a cocking piece, a multifunction latch lever, a stop of the multifunction latch, a lock pin splint, a latch of the ramrod, a spring of the latch of ramrod, a ramrod, a caseless ammunition.

A firearm preferably permits a user to readily change ammunition type and associated magazine configuration at user discretion. Such a firearm may be optimally practiced as a pistol, rifle, or submachine gun but is not limited to a particular caliber size or configurations. A main receiver body of the firearm is preferably of a monolithic construction whereby the handguard and breech bolt carrying bore can be manufactured from a single piece of material such as, for example, an aluminum extrusion or polymer injection molded component. In at least one or more of these respects, the firearm is of an improved design to both simplify and speed manufacturing and assembly, while simultaneously reducing manufacturing costs normally associated with the firearm industry's usual state-of-the-art (e.g., prior art) methods.

A firearm preferably permits a user to readily change ammunition type and associated magazine configuration at user discretion. Such a firearm may be optimally practiced as a pistol, rifle, or submachine gun but is not limited to a particular caliber size or configurations. A main receiver body of the firearm is preferably of a monolithic construction whereby the handguard and breech bolt carrying bore can be manufactured from a single piece of material such as, for example, an aluminum extrusion or polymer injection molded component. In at least one or more of these respects, the firearm is of an improved design to both simplify and speed manufacturing and assembly, while simultaneously reducing manufacturing costs normally associated with the firearm industry's usual state-of-the-art (e.g., prior art) methods.

A conversion kit for a handgun is particularly suitable for converting a pistol into a pistol carbine. There is described the implementation of such a conversion kit, a conversion method and also a handgun that is converted in this way. The conversion kit for the handgun includes a housing. The housing is configured for establishing a connection to a frame of the handgun and for this purpose it has a linear guide for receiving the handgun frame.

A conversion kit for a handgun is particularly suitable for converting a pistol into a pistol carbine. There is described the implementation of such a conversion kit, a conversion method and also a handgun that is converted in this way. The conversion kit for the handgun includes a housing. The housing is configured for establishing a connection to a frame of the handgun and for this purpose it has a linear guide for receiving the handgun frame.