Mount for mounting accessories on a fire arm

A mount for mounting on a fire arm an optical sight, a magnifier, a night vision device or any other accessory of the weapon, comprising a base plate having an upper surface and a lower surface, to be connected with the accessory, means for clamping the base plate to a rail on the weapon with the base plate extending in the longitudinal direction of the rail and with the lower surface engaging the rail, two aligned first grooves in the upper surface of the base plate extending in the longitudinal direction of the rail when the accessory is mounted to the rail adjacent ends of the grooves being mutually spaced, a second groove in the upper surface of the base plate, extending transversely of said first grooves, first protrusions on the lower surface of the accessory guidingly engaging said first grooves, and a second protrusion on the lower surface of the accessory located between said first protrusions and engaging said second groove to prevent displacement of the accessory along said first grooves.

The mount as defined in claim 3, wherein said first grooves each have a plane bottom surface and inclined side surfaces joining the bottom surface, and wherein said first protrusions each have a plane bottom surface and inclined side surfaces joining the bottom surface and engaging the inclined side surfaces of said first grooves the accessory being supported on the base plate at the inclined side surfaces leaving a gap between the bottom surface of said first protrusion and the bottom surface of said first grooves.

The mount as defined in claim 1, wherein a spacer plate having an upper surface and a lower surface is located between the base plate and the accessory and wherein grooves identical with said first grooves are provided in the upper surface of the spacer plate and protrusions identical with said first and second protrusions are provided on the lower surface of the spacer plate.