The Mobile Suit Option Set 4 & Union Mobile Worker set is a 1/144 scale High Grade IRON-BLOODED ARMS add-on kit released in 2016.
- Booster unit
- Battle Blade
- Union Mobile Worker
Kit Features & Gimmicks
- The Booster unit is compatible to HG Gundam Kimaris.
- Booster parts are also poseable.
- Battle Blade can be used for HGI-BO EB-06 Graze and it's variants excluding Graze Ein.
Tips & Tricks
- Parts required to create the Graze Ground Type:
- The hover units & backpack piece from the 9th Option Set
- The Battle Blade
- The Leg Boosters from Graze Ritter
Other Gunpla releases with the add-on kits
- HGI-BO EB-06j Graze Ground Type set (with the Battle Blade runner)