Abstract: Adjusting mechanism for the front sight and the rear sight of a firearm in which the sighting line is located a relatively large distance above the firearm. The adjusting mechanism includes an elastically deformable member in the form of a rod for the rear sight and in the form of a flat blade for the front sight. The rod has a first end which is fastened to the rear sight support and a second end rigidly connected with the rear sight. The flat blade has a first end fastened to the front sight support and a second end rigidly connected with the top of the front sight. A control, in the form of a rotatable screw receivable in an internally threaded member, is provided for each sight for varying the distance between an area of each member and its respective support. Adjustment of the rear sight is, advantageously, only in a direction perpendicular to the longitudinal axis of the barrel of the firearm.

Abstract: A firearm capable of shooting in bursts, or to fire shot by shot, or to have a safety position in which no firing is possible. The firearm includes a firing selector in the vicinity of the trigger. The firing selector is arranged so that its outer part can occupy a central position symmetrical with respect to the vertical plane passing through the axis of the firearm, a right-hand eccentric position located to the right of the plane, and a left-hand position located to the left of the plane. The central position corresponds to the "safety" position of the firing selector and the two off-center positions correspond to the "burst" and "shot-by-shot" positions. In a first embodiment, the firing selector slides in a direction perpendicular to the vertical plane passing through the axis of the firearm, and is formed by a slide which has a stepwise inner part and an outer part formed by its two ends which protrude on the right-hand and left-hand sides of the firearm.

Abstract: A firearm whose body has two opposite sides for the ejection of shells is provided with a removable hood having a lateral shield which permits the marksman to cover that one of the two orifices which is not in use. The upper portion of the hood has a convex curved shape corresponding to the shape of the upper wall of the firearm body but of slightly smaller cross-section. At the bottom of the lateral shield of the hood, a hook is provided to grip an edge at the base of the side wall. The hook acts as a hinge for the positioning of the hood by a transverse tilting movement accompanied by an elastic deformation due to expansion of the curved upper portion of the hood. The upper portion thus comes to cap over and elastically grip the curved upper portion of the body of the firearm.

Abstract: A firearm having a launching tube the rear portion which is surrounded by a forestock serving as support for the launching tube. The forestock is formed of two parts which are removable independently of each other. One part is a lower housing which serves as support for certain firing mechanisms, such as the trigger mechanism. The lower housing is fastened by screws to the launching tube and breech housing of the firearm. The other part is an upper hood which protects accessory mechanisms present in the upper region of the firearm, such as sighting and recocking devices. The upper hood is fastened by screws to the launching tube.

Abstract: Two articulated props for a firearm are lockable in a firing or in a carrying position by a finger on the upper end of the props. A spring urges the finger into one or the other of two radial recesses provided on a trunnion protruding laterally from the firearm. The props can be unlocked by exerting a pull on the free end of the props so that the finger emerges from the recess.

Abstract: An automatic firearm having a bolt which recoils upon each shot and an additional mass mounted for sliding parallel to the bolt and fastened to the bolt by an amplifying lever which is pivotally mounted on the bolt by a transverse pin and which has a resting surface adapted to come into contact with a stop surface which is stationary at the start of the recoil of the bolt. The amplifying lever is H-shaped. The cross bar of the H constitutes the transverse axis of pivoting of the assembly of the lever and the two vertical uprights constitute two symmetrical unit amplifying levers operating in parallel each capable of assuring a proper fastening together of the bolt and the additional mass. The assembly of the amplifying lever has complete symmetry with respect to the central plane perpendicular to its axis of pivot and lends itself to continuation of the firing in case of the breaking of one of the unit amplifying levers.

Abstract: The rear sight of a firearm has a peephole device formed by a hollow tube, each of the two ends of which are closed by a peephole. Each peephole has a central orifice therein. The orifice of the peephole of the rear side has a larger diameter than the orifice of the peephole on the front sight side. Each peephole is pivotally mounted and cooperates with an elastic member which holds the peephole in its tube-opening or tube-closing position. In a further embodiment, two peepholes are provided at each end of the tube.