The present invention relates to a pistol kit. According to one embodiment of the present invention, the pistol kit comprises: a first kit unit coupled to a position, to which a removed first grip panel is coupled, on one surface of an automatic pistol unit of which the first grip panel is removed while having a first picatinny rail unit provided in a lower portion of a gun barrel of the automatic pistol unit; and a second kit unit coupled to a position, to which a removed second grip panel is coupled, on the other surface of the automatic pistol unit of which the second grip panel is removed while having a second picatinny rail unit provided in the lower portion of the gun barrel of the automatic pistol unit. As the first kit unit and the second kit unit are coupled to the automatic pistol unit, the first picatinny rail unit and the second picatinny rail unit are coupled to each other, thereby forming a picatinny rail.
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