This gundam papermodel is a SD Griffon. This papercraft is designed by timmy arditio. The Thunder Griffon Gundam was introduced in the New Mobile Report Gundam Wing Perfect Album Bom-Bom Comic Variations.
A support Mobile Armor intended to be used with the XXXG-01SR Gundam Sandrock, Its form resembles that of a griffon. It was designed to be exceptionally maneuverable and flexible in deployment and can operate both on land and in the air, It also supports an energy recharge system for the Gundam Sandrock.
You can download this SD gundam papercraft from here: SD Thunder Griffon Gundam Papercraft Free Download