This gundam paper model is a Char Aznable colors MS-06S Zaku II Commander Type, which looks very similar to the standard MS-06F Zaku II, the papercraft is created by Innerbrain. This unit first appears in the anime series Mobile Suit Gundam.
The S-Type Zaku II features a squad-leader "antenna" that is mounted on the head on the Zaku II for enhanced communication capabilities, which is used to designate squad-leaders or higher ranking pilots from other squad-members or lower ranking pilots. It also featured a more powerful powerplant, which in turn, gave the S-Type Zaku II greater thrust and acceleration. However, since no changes were made to the fuel tanks, the S-Type's operating time is shortened as a result. This allowed them to move at speeds 3x faster than a normal Zaku II. This made it incredibly dangerous in the hands of the ace pilots it was handed out to, such as the "Red Comet" Char Aznable, who sank 5 Magellan-Class Battleships in the Battle of Loum.
It was noted in an extra feature that came with the 08th MS team DVDs that the 3 times faster figure came about from Char's clever use of Terrain and debris to boost off of, saving fuel and increasing his speed compared to normal. [Source: wikia]
You can download this papercraft template here: