Our staff have built
Nu Gundam (Heavy Weapon System Equipment Type) (HGUC) without painting it or adding extra parts to it, to give our customers some idea what the model looks like after being simply put together.
This process of simple assembly is called "Sugumi," literally "simple assembly," among Japanese Gunpla fans. Please note that this is a technical term of sort, not understandable to most ordinary Japanese, though.
For more information,
see this.