This is a set of 3d models that when 3d printed creates the famous bounty hunter Samus Aran's Arm Cannon from Metroid Prime. This version is able to open and close the barrel to activate missile mode using a series of 4 bar mechanisms. It also has slots cut out for the addition of LED lights or EL wire. You will need some bolts or post screws, nuts, mini cabinet hinges (if not using revised models), and a spring for the opening action.

final length of the arm cannon is near 24", close to in-game scaling for someone near 6' tall.