Abstract: Device for removal of cartridges and/or cartridge casings in a drop-barrel weapon having at least one cartridge ejector axially displaceable in a barrel part for removal of unfired cartridges and an ejector mechanism acting on the cartridge ejector for ejection of spent cartridge casings. The ejector mechanism has a locking pin, displaceable in the cartridge ejector, for releasable locking of the cartridge ejector in the barrel part. A guide pin is arranged in the cartridge ejector that engages on the cartridge ejector via a compression spring arranged in the interior of the cartridge ejector and can be displaced by a tension slide arranged on barrel part.

Abstract: In a head-mounted display device, image display light emitted from a display device is directed towards the eye of an observer by changing the light path thereof by means of an optical system. The display device, optical system and a drive signal generating device for the display device are worn on the head of the observer by means of a holding member. This optical system is positioned in front of the display device emitting display light in a forward direction from a position separated radially from the visual axis of the observer when looking straight ahead. The drive signal generating device is located in a position separated radially from the visual axis with an interval from the display device and optical system.

Abstract: A method and a device for retrofitting existing autoloading pistols having a one-piece bolt stop pin. The first step of the retrofitting method is to cut off the original bolt stop pin and then machine a threaded bore in the remaining shaft. In addition, an extension which mimicks the original bolt stop pin configuration is manufactured. The extension has a threaded end which is screwed into the threaded bore in the remaining shaft portion of the original bolt stop pin. To disassemble a pistol having a two-piece bolt stop pin, the bolt stop pin extension is unthreaded from the remaining shaft portion using a screwdriver or similar implement. Then the loose extension is pulled upwards and out of the receiver, freeing the bolt to be pulled rearward and out of the receiver. The pistol is further modified by rounding the sharp upper corner of the hammer, e.g., by machining a smooth radius.

Abstract: An object of the present invention is to provide a switching mechanism of an ejector which is simple to operate and in which projecting portions on a gun are minimized. A hammer is pivoted to return to the original position when a breech is opened after a gun is fired, whereby a projection of the hammer abuts against a head of a trip rod. Thus, the trip rod is shifted longitudinally and the ejector mechanism is operated. A spiral guide which is engaged with the trip rod is formed on a selector button adjacent to the trip rod, and a groove for rotation is formed on an end surface of the selector button. When the selector button is rotated, the trip rod is shifted in the direction which intersects with its longitudinal direction, thereby switching between a state in which the projection abuts against the head and another state in which they are not abutted against each other.

Abstract: An extractor/ejector system is described for automatically extracting a cartridge from the breech of a firearm or automatically ejecting the cartridge when the cartridge has been fired. A gas port is provided in the barrel of the arm to direct gases from the barrel against a piston: a piston rod connected to the piston contacts a sear and is forced into a latched position with an extractor/ejector spring in compressed condition. When the action of the firearm is broken, a lug is provided for contacting an extractor having a camming surface contacting the sear. The motion of the extractor caused by the lug forces the sear out of engagement, permitting the ejector spring to rapidly expend and effectively eject the fired cartridge.