This paper model is a full size Browning High Power GP 35 Virgin Maria, a handgun from the Fallout 3 video game, the paper model is created by GamePaper. The size of finished model is about 131 (H) x 25 (W) x 206 (D) mm.
You can download the papercraft model here: Fallout 3 - Browning High Power GP 35 Virgin Maria Free Paper Model Download [Box] [Gavitex]