An improved trigger assembly for a firearm includes twin disconnectors that are each independently selectable and adjustable to provide different trigger pull weights. The trigger assembly may be operably controlled by the safety selector which defines several different shaped engaging surfaces that allow the operator to selectively choose which of the disconnectors to operate with the firearm.

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 invention belongs to a weapon namely to the automatic weapons without ammunition. Particularly it belongs to the weapons using the energy of the explosion mixture gas, flammable liquid or other mixture in the combustion chamber as a mover of bullets. A weapon without ammunition, arranged according to the bullpup scheme, contains: the barrel; the receiver in the form of a cylinder rolling in a rectangular box; the trigger mechanism; the piston for supplying combustible mixture to the combustion chamber and for cooking the compressed air in the mixing tube. This piston is connected by a rod with the piston gas tube; the cylinder full of compressed gas, flammable liquid or other mixture; the drum with several chambers of internal combustion in the form of elongated cylinders. When moving to the trunk a drum is pushed by the nozzle of the lower chamber in the rear part of the bullet and toilet it in the trunk from the top of the camera. This occurs by the rotation around its own axis and longitudinal movement along this axis; the ignition mechanism consisting of a piezoelectric element and the spark; the secondary ignition system consists of a battery and a capacitor; the venting mechanism with the gas tube and piston, in which the gases are directed toward the muzzle; the return mechanism; the multi-function ammunition cartridge of extended capacity, feeding the bullets into the machine vertically. There is a function of the butt, and when you transfer the spare magazines on the body of the soldier there is a function of armor plates.

Firearms and barrel assemblies are provided herein that include a barrel assembly having a barrel having a proximal end and a distal end comprising a muzzle. The barrel also includes a chamber defined in the proximal end. The chamber includes a distal end and a proximal end. A bore extends distally from the distal end of the chamber. The bore defines a central axis of the barrel assembly. The barrel assembly also includes a barrel extension extending from the proximal end of the barrel. The barrel extension has a distal end and a proximal end. The barrel extension defines a bolt receiving recess in communication with the chamber. The barrel extension further has a barrel vent channel defined therein in communication with the bolt receiving recess. The barrel vent channel is defined in the barrel extension in a direction that is transverse to the central axis of the barrel assembly.

Firearms and barrel assemblies are provided herein that include a barrel assembly having a barrel having a proximal end and a distal end comprising a muzzle. The barrel also includes a chamber defined in the proximal end. The chamber includes a distal end and a proximal end. A bore extends distally from the distal end of the chamber. The bore defines a central axis of the barrel assembly. The barrel assembly also includes a barrel extension extending from the proximal end of the barrel. The barrel extension has a distal end and a proximal end. The barrel extension defines a bolt receiving recess in communication with the chamber. The barrel extension further has a barrel vent channel defined therein in communication with the bolt receiving recess. The barrel vent channel is defined in the barrel extension in a direction that is transverse to the central axis of the barrel assembly.

Systems, devices, apparatus and methods for providing a semi-automatic rifle with ammunition magazine, having a docking port/station for allowing a semi-automatic pistol to be inserted. The trigger on the pistol can be used to fire the rifle and use the rifle ammunition. When the rifle ammunition is depleted, the pistol can be removed and separately fired using its' own ammunition.

Systems, devices, apparatus and methods for providing a semi-automatic rifle with ammunition magazine, having a docking port/station for allowing a semi-automatic pistol to be inserted. The trigger on the pistol can be used to fire the rifle and use the rifle ammunition. When the rifle ammunition is depleted, the pistol can be removed and separately fired using its' own ammunition.

A firearm having reduced muzzle rise is disclosed. The firearm includes a barrel having a breech end, an opposing muzzle end, and a bore defining a barrel centerline which, when extended in a longitudinal direction, defines a barrel axis. The firearm further includes a magazine tube disposed above the barrel, a receiver defining a lower opening to receive the barrel, and an upper opening to receive the magazine tube. The firearm further includes a stock defining a body support surface where the stock braces against a user's body. The barrel axis passes through the body support surface of the stock.

Trigger armor systems and grip armor systems are provided. The trigger armor system may include an integral finger rest, grip, and knuckle guard. The grip armor system may include an integral angle grip and well grip. Trigger and grip armor systems including an integral trigger armor system and grip armor system are also provided.