Abstract: A shockwave impulse disruptor system for use in an underwater firearm. The system includes a barrel having a bore, a muzzle, and at least one barrel port. A housing is external to the bore and defines at least a first gas expansion chamber. The expansion chamber is in fluid communication with the barrel port and has at least one exhaust port. The barrel bore and expansion chamber are flooded when underwater. Propellant gases that push a projectile through the bore are vented through the barrel port to force water from the expansion chamber through the exhaust port and to vent propellant gases. This delays the release of gases to surrounding water and reduces the amount of gas expelled through the muzzle.

Abstract: A firearm recoil buffer having a tubular body with a closed end, an open end, and an interior surface including an inset notch adjacent the open end. Fill material is provided in the tubular body to add a preselected amount of weight. A closure member has an attachment portion with a pawl portion that connectably engages the inset notch when the closure member is assembled by pressing into the tubular body.

Abstract: A shockwave impulse disruptor system for use in an underwater firearm. The system includes a barrel having a bore, a muzzle, and at least one barrel port. A housing is external to the bore and defines at least a first gas expansion chamber. The expansion chamber is in fluid communication with the barrel port and has at least one exhaust port. The barrel bore and expansion chamber are flooded when underwater. Propellant gases that push a projectile through the bore are vented through the barrel port to force water from the expansion chamber through the exhaust port and to vent propellant gases. This delays the release of gases to surrounding water and reduces the amount of gas expelled through the muzzle.

Abstract: A firearm recoil buffer having a tubular body with a closed end, an open end, and an interior surface including an inset notch adjacent the open end. Fill material is provided in the tubular body to add a preselected amount of weight. A closure member has an attachment portion with a pawl portion that connectably engages the inset notch when the closure member is assembled by pressing into the tubular body.

Abstract: Disclosed is an integral firearm sound suppressor, comprising a barrel, a first tube, and interior connector, a baffle tube, and at least one baffle. The barrel has an axial bore, a chamber end, and a muzzle end. The chamber end is attachable to a receiver by the barrel nut. The first tube extends forwardly of the barrel nut to define an annular first chamber at least partially surrounding the barrel and having a closed forward end. The barrel has at least one port providing fluid communication between the bore and the first chamber. The interior connector supports the muzzle end of the barrel. The baffle tube extends forwardly of the muzzle end of the barrel and has a forward end wall defining an exit opening. The at least one baffle is positioned in the baffle tube and spaced forward of the muzzle end of the barrel.

Abstract: Disclosed is an integral firearm sound suppressor, comprising a barrel, a first tube, and interior connector, a baffle tube, and at least one baffle. The barrel has an axial bore, a chamber end, and a muzzle end. The chamber end is attachable to a receiver by the barrel nut. The first tube extends forwardly of the barrel nut to define an annular first chamber at least partially surrounding the barrel and having a closed forward end. The barrel has at least one port providing fluid communication between the bore and the first chamber. The interior connector supports the muzzle end of the barrel. The baffle tube extends forwardly of the muzzle end of the barrel and has a forward end wall defining an exit opening. The at least one baffle is positioned in the baffle tube and spaced forward of the muzzle end of the barrel.