Patent ID: 6869285

Claim:
A training firearm comprising: a receiver; a barrel supported on the receiver; a slide slidably mounted for bidirectional forward and rearward movement relative to the receiver; a firing pin behind the barrel, the firing pin mounted or movement between a retracted position and a firing position; a firing assembly comprising: a driver movable between a cocked position and the firing position, wherein in the firing position the driver is adapted to impact the firing pin propulsively, and wherein in the cocked position the driver is held in biased condition in preparation for release; and a trigger adapted to release the driver; wherein the slide is adapted to recock the driver when the slide moves bidirectionally; and a blow back assembly interposed between the barrel and the firing pin, the blow back assembly comprising: a tube defining an external pressure chamber, a housing defining an internal pressure chamber, the housing movably received in the tube, the housing having a valve opening fluidly connecting the internal pressure chamber with the external pressure chamber; a closure member movable in the housing between an open position in which the valve opening is open and a closed position in which the valve opening is closed, wherein the closure member is adapted to move in response to advancement of the firing pin; a compartment inside the firearm adapted to contain a compressed gas cartridge; and a conduit adapted to fluidly connect the internal pressure chamber to a th compressed gas cartridge in the compartment; wherein one of the tube and the housing is fixed relative to one of the receiver and the slide, and wherein the other one of the tube and the housing is fixed relative to the other one of the receiver and the slide; whereby, when the compressed gas cartridge is installed in the compartment, activation of the trigger causes the slide to move bidirectionally recocking the firearm.