This gundam paper model is a SD OZ-06MS Leo, a mass-produced general purpose mobile suit in the After Colony timeline, the unit is featured in Mobile Suit Gundam Wing, the papercraft is created by [unknown], shared by hswphil92.
When the OZ-00MS Tallgeese mobile suit prototype proved too expensive and unfeasible for most pilots to handle, the Tallgeese's design was downgraded into a simpler, less-powerful unit. Naming their mobile suits after signs of the Zodiac, OZ's first mass-produced unit was called the OZ-06MS Leo. The Leo would serve as the mainstay of the mobile suit forces for the Earth Alliance military, the Specials force, and later OZ and its Romefeller Foundation masters.
The Leo gains its adaptability through the hardpoints on its shoulder armor pieces to mount various types of weaponry, and also the hardpoints in the back that allow it to mount different backpacks. It uses a similar leg unit to the Tallgeese.
First introduced into service in AC 175, the Leo was slowly upgraded over the years leading up to the outbreak of total war in AC 195. By that time, the Leo had actually changed very little from earlier models. The primary reason for the Leo's long service record was its simple adaptability: in addition to a wide variety of hand weapons, the Leo could be outfitted with a winged thruster pack for limited atmospheric flight capability.
The OZ-06MS Leo was the first Mass production mobile suit used by OZ, designed as a scaled-down version of the Tallgeese, which was deemed too expensive for mass production. The lead developer of the original prototype Leo was Seis Clark. Although lightly armed and is obviously rather difficult to pilot effectively, the Leo proved superior to anything produced by the Space Colonies. The base Leo was equipped with a Beam rifle and a shield which contained a pair of beam sabers, thus the Leo was equipped for almost anything, and it could also be loaded with a standard rifle or heavier dober gun. Later, almost all Leos were equipped with vernier backpacks for space combat. The aging Leo was eventually phased out for the newer OZ-12SMS Taurus and OZ-02MD Virgo mobile suits, the Leo's legacy finally ending with the Serpent, one of the toughest non-Gundam mobile suits in the After Colony timeline. [Source: wikia]
You can download this papercraft model template here: