The present invention is to provide a frame for a polymeric pistol with a
metal rail, capable of securing the structural
soundness of firearms to secure an accuracy rate of bullet even in high-temperature environments, preventing the high-temperature heat generated in a
barrel or the like from being transferred, as it is, to a
handle of the frame, and disassembling and replacing components as occasion demands.According to an aspect of the invention to achieve the object described above, there is provided a frame for a polymeric pistol with a
metal rail, a pistol having a slide, the frame including: a lower frame made of a reinforced plastic material and having a
handle formed at its lower portion; and an upper frame assembled onto the lower frame while being assembled to the slide and made of a
metal material, wherein: the lower frame includes a first support positioned in front of the
handle to support a bottom surface of the upper frame, and a second support positioned behind the handle to support a rear surface of the upper frame; and the upper frame is assembled to the lower frame such that the bottom and rear surfaces of the upper frame are supported by the first and second supports, and the upper frame has a front rail and a rear rail that are integrally formed on its upper surface, the front and rear rails being assembled to the slide.