Abstract: A semiautomatic firearm and firearm firing mechanism includes a bolt assembly having a bolt body coupled to a locking head for imparting a dwell in the sequence or process of bullet casing ejection, reloading, and re-cocking sequence during firing of the firearm. The locking head and bolt body rotate relative to one another as they translate longitudinally relative to one another, owing to corresponding engagement members. The locking head includes an additional engaging member for engagement with a corresponding engaging member along an inner surface of a fire control housing that houses the firing mechanism, so that the rotation and longitudinal translations of the locking head are performed in a controlled manner, which further controls the movement of the locking head and the bolt body relative to one another. A striker is released by a sear, which is coupled to a trigger, to initiate the firing and reloading/re-cocking sequence.

Abstract: A semiautomatic firearm and firearm firing mechanism includes a bolt assembly having a bolt body coupled to a locking head for imparting a dwell in the sequence or process of bullet casing ejection, reloading, and re-cocking sequence during firing of the firearm. The locking head and bolt body rotate relative to one another as they translate longitudinally relative to one another, owing to corresponding engagement members. The locking head includes an additional engaging member for engagement with a corresponding engaging member along an inner surface of a fire control housing that houses the firing mechanism, so that the rotation and longitudinal translations of the locking head are performed in a controlled manner, which further controls the movement of the locking head and the bolt body relative to one another. A striker is released by a sear, which is coupled to a trigger, to initiate the firing and reloading/re-cocking sequence.

Abstract: A portable apparatus attachable to a wheelchair for movably supporting a gun thereon includes a pneumatic/hydraulic fluid operated control circuit for operably controlling the direction of the gun while sitting in the wheelchair. The apparatus includes a support adapted to attach to the wheelchair and support a gun, and further includes a control system including a hydraulic linear actuator and a hydraulic rotary actuator operably connected to the support, an air tank operably connected through control valves and air/oil chambers to the actuators, and controls including a joystick which can be readily manipulated by the person in the wheelchair to move the control valves and thereby controllably actuate the actuators to aim the gun. A pair of oil interlock valves are operably connected to either side of each of the actuators to securely locate the gun in a given position once aimed.