This gundam papercraft is a SD MSM-04 Acguy, a mass produced amphibious mobile suit, featured in the anime series Mobile Suit Gundam, the paper model is created by [unknown]. There are other two versions on the site: SD MSM-04 Acguy Gundam Papercraft and Ver.2.
Following the Zimmad Company's MSM-03 Gogg, the Zeonic Company produced their own amphibious mobile suit for the Principality of Zeon, the MSM-04 Acguy. Acguys used many of the same parts and components as the MS-06F Zaku II, including twin Zaku II F-Type Minovsky ultracompact fusion reactors. However, even with the twin reactors, the Acguy left only a trace heat signature, making it effective for stealth and infiltration operations.
The Acguy's weapons consisted of four 105mm vulcan guns mounted in the head. In its right forearm was a mega particle gun, but in some units, this was replaced by a vulcan gun. The right forearm also had extendable claws known as Iron Nail (along with an extendable arm to increase striking distance) for striking the Earth Federation's mobile suits and property. In the left forearm was a six-tube missile launcher. Some models also had missile launchers in the right forearm, replacing the mega particle cannon and claws. [Source: wikia]
You can download this paper model template here: SD MSM-04 Acguy Ver.3 Free Gundam Paper Model Download [Box] [Gavitex]