An operating system for a firearm includes a trigger, a hammer, a disconnector, a pivoting arm, and a lower member. The trigger includes a lower portion, an upper portion, and a trigger pivot. The disconnector includes a lower portion, an upper portion, and a disconnector pivot. The pivoting arm includes a forward protrusion, a pivoting arm opening, and a pin extending through the pivoting arm opening. The lower member includes a lower member opening and a pin hole that is coaxial with the trigger pivot and the disconnector pivot. At least a portion of the trigger and at least a portion of the disconnector are disposed within the lower member opening. Motion of the trigger causes the forward protrusion of the pivoting arm to engage a bolt carrier group and hold the bolt carrier group in an open position.

An operating system for a firearm includes a trigger, a hammer, a disconnector, a pivoting arm, and a lower member. The trigger includes a lower portion, an upper portion, and a trigger pivot. The disconnector includes a lower portion, an upper portion, and a disconnector pivot. The pivoting arm includes a forward protrusion, a pivoting arm opening, and a pin extending through the pivoting arm opening. The lower member includes a lower member opening and a pin hole that is coaxial with the trigger pivot and the disconnector pivot. At least a portion of the trigger and at least a portion of the disconnector are disposed within the lower member opening. Motion of the trigger causes the forward protrusion of the pivoting arm to engage a bolt carrier group and hold the bolt carrier group in an open position.

An operating system for a firearm includes a trigger, a hammer, a disconnector, a pivoting arm, and a lower member. The trigger includes a lower portion, an upper portion, and a trigger pivot. The disconnector includes a lower portion, an upper portion, and a disconnector pivot. The pivoting arm includes a forward protrusion, a pivoting arm opening, and a pin extending through the pivoting arm opening. The lower member includes a lower member opening and a pin hole that is coaxial with the trigger pivot and the disconnector pivot. At least a portion of the trigger and at least a portion of the disconnector are disposed within the lower member opening. Motion of the trigger causes the forward protrusion of the pivoting arm to engage a bolt carrier group and hold the bolt carrier group in an open position.

An operating system for a firearm includes a trigger, a hammer, a disconnector, a pivoting arm, and a lower member. The trigger includes a lower portion, an upper portion, and a trigger pivot. The disconnector includes a lower portion, an upper portion, and a disconnector pivot. The pivoting arm includes a forward protrusion, a pivoting arm opening, and a pin extending through the pivoting arm opening. The lower member includes a lower member opening and a pin hole that is coaxial with the trigger pivot and the disconnector pivot. At least a portion of the trigger and at least a portion of the disconnector are disposed within the lower member opening. Motion of the trigger causes the forward protrusion of the pivoting arm to engage a bolt carrier group and hold the bolt carrier group in an open position.

A firearm safety system for use in an associated portable electronic device is described herein. The system includes logic executable by a microprocessor to control a firearm to selectively prevent a feed member from communicating a bullet or a striker from contacting the bullet thereby selectively preventing shooting the gun. Pass code data is received from an associated user of the firearm safety system and is compared against security pass code data stored a memory to generate an unlock signal in response to the logic determining the pass code data received from the associated user matches the stored security pass code data. The unlock signal is communicated from the associated portable electronic device to a receiver of the firearm device as the enable signal to control the associated firearm device to selectively permit the feed member and/or the striker from operating.

A firearm safety system for use in an associated portable electronic device is described herein. The system includes logic executable by a microprocessor to control a firearm to selectively prevent a feed member from communicating a bullet or a striker from contacting the bullet thereby selectively preventing shooting the gun. Pass code data is received from an associated user of the firearm safety system and is compared against security pass code data stored a memory to generate an unlock signal in response to the logic determining the pass code data received from the associated user matches the stored security pass code data. The unlock signal is communicated from the associated portable electronic device to a receiver of the firearm device as the enable signal to control the associated firearm device to selectively permit the feed member and/or the striker from operating.

A firearm compatible with pistol magazines and cartridges is disclosed. The firearm may include an upper receiver. The firearm also may include a bolt carrier having at least one fixed bolt carrier key extending therefrom. In addition, the firearm may include a recoil spring guide rod. The at least one bolt carrier key may be slidably attached to the recoil spring guide rod. A recoil spring may be disposed on the recoil spring guide rod between the at least one bolt carrier key and a recoil bumper.

A firearm compatible with pistol magazines and cartridges is disclosed. The firearm may include an upper receiver. The firearm also may include a bolt carrier having at least one fixed bolt carrier key extending therefrom. In addition, the firearm may include a recoil spring guide rod. The at least one bolt carrier key may be slidably attached to the recoil spring guide rod. A recoil spring may be disposed on the recoil spring guide rod between the at least one bolt carrier key and a recoil bumper.

A coupler for coupling shock tube to a disrupter cannon so that the shock tube automatically decouples from the coupler and thereby from the disrupter cannon after the disrupter cannon has been fired to launch a projectile. The coupler retains the shock tube with a force that is greater than the force provided by the shock tube when it is ignited, but is less than the force of a reflected wave of pressure out of the disrupter cannon after the disrupter cannon has been fired.

A coupler for coupling shock tube to a disrupter cannon so that the shock tube automatically decouples from the coupler and thereby from the disrupter cannon after the disrupter cannon has been fired to launch a projectile. The coupler retains the shock tube with a force that is greater than the force provided by the shock tube when it is ignited, but is less than the force of a reflected wave of pressure out of the disrupter cannon after the disrupter cannon has been fired.