P-Bandai: HGUC 1/144 Narrative Gundam B Packs (Expansion set)
Release Date: April 2019
Price: 1,404 Yen
Kit comes with extension parts to make a Narrative Gundam B-Packs equipment version.
You can get the Narrative Gundam's body from the A-packs set, which Premium Bandai won't be handling in their web-shop.
