Tagged world of tanks because the IS-7 shown here is derived from a 3D skin by the name of "Granite" featured there. Note the ZU-23 AA mount and smoke grenades.
I checked the artist's page on the source link, but I'm under the impression he is simply that creative at LEGO, not that those are special kits...
I mean, some custom LEGO model builders create and share instruction booklets so you can make their work at home, but I imagine this wasn't the case here