This paper model is a very detailed Armored Personnel Unit (APU), a hydraulic power battle suit designed for combat and were a primary line of defense for Zion, based on the sc-fi film series The Matrix, the papercraft was created by [unknown], and shared by B.Fish.
More than 120,000 units were produced by the time of the Battle of Zion, only 350 remain. Its main armament are two 30mm rapid-fire cannons attached to its arms. All motion of the APU is controlled by the operator's hands, including its legs. APU operators were required to pass a training program.
APU ammunition is reloaded by hand with the help of special crane from the back. To reload the cannons, a runner with a cart loaded with ammo would have to run out in the middle of the battle to jam the boxes of ammo into the APU. After the reload process is finished, bullet will be loaded to the gun via a version of flexible ammunition belt feed. When the ammo is running out the pilot is trained to pack their gun into their holster, reattaching the belt feed automatically once the ammunition become available.
APU armor is ironically minimal, favoring speed and firepower over bulky protection. The reason being that in all likelyhood armor would only mean a slower death for the pilot if machines disabled his APU. The armor originally used on APUs, as seen on the UN version, would do very little to defend against machines who've proven many times to be capable of cutting open or slicing quite quickly through the toughest armors Zion can produce. To some people, this seperation of man and machine with a lacking cockpit is also symbolic of who is in control and who is not. [Source: wikia]
You may download this paper model template here [Note: This is a very complex model, freehand template, and confusing instructions. Anybody knows the original link?]: The Matrix - Very Detailed Armored Personnel Unit (APU) Free Paper Model Download [DropBox] [Box] [Ge.tt]