Very tricky to build. I have to creativity to make parts that I was not having to build this custom. Is very accurate to the game. I took lots of pictures to see all the details of this custom. I use fishing cord to make cables then paint then so that way the look like cables. I cut small rectangles to add stickers so that way it looks like the keyboards and countdowns to active the bomb. The color is a mix of gray and washout. The fins was cut of plastic protein shake cap. Then I use a dremmel to cut strait lines and glue it with clear epoxy. Im very happy in how it turns this customs weapon. Very cool weapon to have in the UNSC arsenal.