A method for disassembling and converting a traditional AR-pattern firearm into a bullpup configuration of a semi-automatic rifle firearm assembly includes releasing and removing at least a firearm but stock and a standard bolt carrier group from the rifle firearm and then replacing the removed components with elements from a bullpup kit, namely a bullpup bolt carrier group that includes a bolt carrier and a spring assembly, the spring assembly having compression spring that is loaded when the bolt carrier recoils.

A firearm system for monitoring the displacement of a firearm trigger during a trigger pull includes a firearm body including a handle and a barrel attached to the handle. A trigger is attached to the firearm body, and a position input circuit is attached to the trigger. The position input circuit emits a trigger position signal including information representative of the trigger displacement. The firearm body is in wired or wireless communication with an electronic device. The electronic device can include a monitor, or screen, for graphically displaying a trigger position indicator representative of the displacement of the trigger along one or more axes. The firearm body can include a motion sensing circuit generally adapted to detect motion of the firearm body. The motion sensing circuit can include one or more accelerometers or gyroscopes. A wireless transmitter or transceiver can be positioned on the firearm body for communicating trigger displacement information and/or firearm body motion information to the electronic device. Methods of providing firearm user input information to a firearm user are also provided.

A firearm system for monitoring the displacement of a firearm trigger during a trigger pull includes a firearm body including a handle and a barrel attached to the handle. A trigger is attached to the firearm body, and a position input circuit is attached to the trigger. The position input circuit emits a trigger position signal including information representative of the trigger displacement. The firearm body is in wired or wireless communication with an electronic device. The electronic device can include a monitor, or screen, for graphically displaying a trigger position indicator representative of the displacement of the trigger along one or more axes. The firearm body can include a motion sensing circuit generally adapted to detect motion of the firearm body. The motion sensing circuit can include one or more accelerometers or gyroscopes. A wireless transmitter or transceiver can be positioned on the firearm body for communicating trigger displacement information and/or firearm body motion information to the electronic device. Methods of providing firearm user input information to a firearm user are also provided.

A compact shotgun, a trigger assembly that could be used with such compact shotgun or other firearms, and an adapter and multipurpose mount that could be used with firearms or other devices are all disclosed. Each element has separate utility and combined utility in forming a combined under-mounted shotgun and long gun assembly.

A compact shotgun, a trigger assembly that could be used with such compact shotgun or other firearms, and an adapter and multipurpose mount that could be used with firearms or other devices are all disclosed. Each element has separate utility and combined utility in forming a combined under-mounted shotgun and long gun assembly.

Implementations of a firearm chassis system are provided. In some implementations, the firearm chassis system may be used to convert a firearm between: a bullpup configuration in which a pistol grip and trigger are positioned in front of the action of the firearm; and a rifle configuration in which the pistol grip and trigger are positioned below the action of the firearm. In some implementations, the present invention is directed to a firearm chassis system that is configured for use with the barreled action of an SKS type rifle.

Implementations of a firearm chassis system are provided. In some implementations, the firearm chassis system may be used to convert a firearm between: a bullpup configuration in which a pistol grip and trigger are positioned in front of the action of the firearm; and a rifle configuration in which the pistol grip and trigger are positioned below the action of the firearm. In some implementations, the present invention is directed to a firearm chassis system that is configured for use with the barreled action of an SKS type rifle.

A bullpup conversion kit for a firearm including a lower receiver with a topside channel that partially receives an upper receiver of the firearm and a magazine well. The firearm includes a trigger pack with a removable trigger. A trigger bar assembly including a trigger bar, a front trigger mount, and a trigger shoe is received within the topside channel. The trigger bar extends along one side of the magazine well. The front trigger mount is disposed on a forward end of the trigger bar. The trigger shoe includes upper and lower ends. The upper end of the trigger shoe is pivotally coupled to the trigger pack in place of the removable trigger. The lower end of the trigger shoe is connected to a rearward end of the trigger bar by a pin. The lower receiver hinges away from the upper receiver about a front hook during disassembly.

A bullpup conversion kit for a firearm including a lower receiver with a topside channel that partially receives an upper receiver of the firearm and a magazine well. The firearm includes a trigger pack with a removable trigger. A trigger bar assembly including a trigger bar, a front trigger mount, and a trigger shoe is received within the topside channel. The trigger bar extends along one side of the magazine well. The front trigger mount is disposed on a forward end of the trigger bar. The trigger shoe includes upper and lower ends. The upper end of the trigger shoe is pivotally coupled to the trigger pack in place of the removable trigger. The lower end of the trigger shoe is connected to a rearward end of the trigger bar by a pin. The lower receiver hinges away from the upper receiver about a front hook during disassembly.

The invention provides remote trigger release for firearms without requiring assembly to said firearms and providing immediate disengagement when the single user discontinues a mechanically required interaction. Trigger release is achieved by means of a handheld pneumatic pump that pressurizes an expandable bladder within a conduit-connected handheld hinged apparatus thus providing two opening points of opposite force that can be applied to the trigger and the inside of trigger guard when said bladder is pressurized. Automatic disengagement of the firearm is achieved by means of a semi-rigid section of fluid conduit oriented such that it can simultaneously serve as a spring to remove said apparatus from the vicinity of said trigger anytime said user ceases interaction. Assertive and continuous user interaction is required by adding a branch off of the pump outlet which must be plugged by the user's thumb in order to build or maintain pressure within the bladder.