Create a gun from a nail gun modified with scrap metal. the nail gun should be the centerpiece of the image, with its original components replaced or enhanced with metal elements. the metal components should be carefully crafted and detailed, to reflect the craftsmanship and attention to detail of the gun. the scrap metal stock should also feature prominently. the stock should consist of several pieces of metal welded together to create a strong and functional structure. the main colors should be blue and gold.