An improved structure of a fast clamping fixture in a gun

The utility model relates to a reformative structure of the arms quick clamp, wherein the bottom of an insert-clip grooved rail forms a landscape orientation socket which break over directing two sides to form a pylome, a holder is pushed, resorted, clipped directing two sides by a spring disposed in the socket to make the left-right push-clip button to stretch the pylome, the left-right push-clip button seat forms the locked mode which only can move inward, a inner edge tip forms a holder upwards heave, the inner edge of the holder forms a pyramidal inlay miniature inward heave to the insert-clip grooved rail, when inward clip and pressure the clamp, the pyramidal inlay can draw to the pylome, the left-right push-clip button can be inward clipped and pressured by the single-hand thumb and forefinger to make the left-right push-clip seat move inward, the inlay can be pulled to the pylome, a permanent seat of the gun barrel can be smoothly registered with the quick clamp, when in location, the clip-pressure clamp fixedly button can be relaxed, the left-right pressure-seat can be pulled by the tension of the spring, the lip pyramidal inlay extends to tight the build-in groove disposed on the arms blocking fixedly seat, the lighting indicating device can be steady attached or unloaded.