Cocoon

Cocoon is one of the three AI weapons introduced in Metal Gear Solid: Peace Walker.



Design
Cocoon is one of the three AI weapons. As with all AI units, it has a AI-cylinder. The design seems to make it a giant destroyer on land, considering that multiple guns lining its body.The bottom platform has four treads to provide it movement. The bottom also has four turrets, two in front and two on the back, with four multi-barrel machineguns sitting on top of it. The top part can turn 360 degrees. It has a head protruding from the top part, which houses the AI cylinder and a cannon. The most notable part is that it has a mechanized arm on the top part, but the use for it is still unknown but probably is used for combat.

Weapons
Cocoon has six multiple-barrel machineguns, two on the top part, four on the bottom platform. It seems to have a excess number of assault rifles, probably used to deal with opposing soldiers, all controlled by the AI from the red dots. It also has a giant tank cannon on its head unit and a giant three-part mechanized arm, though whether the arm is used for combat or not is still unknown.

Peace Walker
Cocoon was assigned to defend the entrance to the underground facility from the Militaires Sans Frontieres. It arrived just after Big Boss managed to defeat 12 Sniper units of the Peace Sentinels guarding the cargo elevator leading to the facility. Big Boss managed to decomission it for good after tearing out the core drives in the AI. The Militaires Sans Frontieres later salvaged several parts from Cocoon, including its armor, to create Metal Gear Zeke