MasterShooter Collectibles - Timeline | Facebook The example they they showed was turning Nucleon (Galvatron's Titan Master) into a gun. Looks like you simply unscrew the face and place this kit on it instead. It has two barrels on it, and you flip one out when you fold up the robot. Looks to be a 5mm peg. I hope they mass produce it in a variety of colors and maybe even some barrel variants!