This is Knight of Gold Mecha with Golden Buster anime papercraft designed by Kyuri. It is based on Five Star Stories/ Five Star Monogatari action figure model.
According to the storyline of Five Star Monogatari, Ladios Sop created the Knight of Gold in response to a request by Lachesis before she underwent her final programming cycle.
At that time, she decided that she wanted Sop for her master and that she wanted him to create a shining mortar headd made of gold so they could get “married” beneath it.
Amaterasu decided to grant Lachesis her request (the MH, in any case, not necessarily the marriage) and dubbed his 3rd masterpiece the Knight of Gold. You must download all parts of Knight of Gold anime papercraft and extract it with winrar.