The look of the gun blue finish is cool. Its history? Way cooler. The original functional purpose of bluing was to prevent scratching and minimize sudden glare for the marksman while looking down the barrel. There is another sport that comes to mind where focus and a dead-eye aim might be important…..We trust that you are following. Gun Blue finish is also appealing because of it’s unlikeliness. Anyone seeing bluing for the first time is always amazed at how a basic color, grey-black silver, could show as vibrant a color as blue when hit by the light. This finish is classic, timeless and a nod to the sportsman. But, anyone can appreciate its brilliance and be drawn to it. Like an heirloom firearm or bottle of bourbon, this finish gets better with time. This finish pairs well with white, red and the correct shades of blue. This finish can only be applied to carbon steel.