The Skull represents vengeance and judgment. This variation is almost inverted, with a black skull instead of the strong white. The spray paint effect gives an urban feel to the image. Makes a powerful statement when put on a weapon, and looks great at the same time. The Skull Black has become somewhat of an iconic symbol as a result of the heroics from the US Military during the recent wars in Iraq.
The Skull is a simple but powerful image that calls to mind many different concepts. While death is often the first association, others include punishment, vengeance, justice, and power. Mortality is the common denominator that levels the playing field, regardless of place or birth or social class. It breaks all language barriers and evokes strong emotions almost instantaneously.
In the military and competitive shooting sports, it's quite common to see the Skull design either etched on the surface of the gun, or applied via decal. The Skull can encourage shooters to be courageous and brave, especially when the stakes are high. Life or death, win or lose, yes or no. These are the lessons we learn in life and they can be symbolized by a single yet simple image: the Skull.