After the events of Char's Counterattack
Under the leadership of Chief Mechanic Astonaige, work began on a locally modified Re-GZ to increase its survival rate.
The idea was to incorporate spare parts from the originally disposable BWS to create a simple transformation system, embodying the "let's try it with what we have" spirit at the site.
The shield cover part was originally covered with an optional parts set to give it a similar look.

Re-Gazi Proto Custom | ねぷパンダ's Gunpla works