This is an older work. I'm posting it for record-keeping purposes. Created September 2018.
It's a snap-fit ​​build with panel lining done using Gundam Marker panel lining pens.
The shield is huge, isn't it? I really like it.
I wanted to add a lot of details here too.
The idea is that it's like a weapon system used in a fortress assault, where the weapons are jettisoned after being fired.

GM Guard Custom (Artillery Support Equipment) | ガッキー's Gunpla works