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: A device, for releasing a locked trigger set by a set-trigger mechanism in a gun having a receiver, a bolt loosely inserted in the receiver, and a bolt handle for rotating and reciprocating the bolt so as to load a bullet and set in a fire-enabling state, includes an abutting portion formed on the bolt handle, and a release link positioned for contact with the abutting portion and a trigger in accordance with a rotational movement of the bolt handle. The trigger locked by the set-trigger mechanism is released when the bolt handle is rotated up to a fire-disabling position, causing the abutting portion to push the release link against the trigger to unlock it. With this construction above, when the bolt handle is in the fire-disabling state, the trigger can never be in the locked position, which enables a safe and secure release of the locked trigger and safe bullet loading and/or removal.

Abstract: A barrel locking mechanism for a break-open-action gun having a barrel and a mechanical section rotatably engaged with each other by a hinge-pin. It has a lug secured to the barrel and having a delining surface. While a stationary receiver is integrally mounted on the mechanical section. On the top of it, a movable receiver having a delining surface corresponding to that of the lug is vertically movably mounted through a spring. When the gun is locked, the lug moves downwards depressing the movable receiver against the spring. As a result, intimate contact of the corresponding surfaces is obtained in order to receive the load when the gun is discharged.