Modular Gundam Backpack Unit - Cannon

This is an armored core inspired backpack with weapons units. I designed them to be modular, will probably make more weapon types later. The backpack should be compatible with recent HG 1/144 gunpla with the two spaced holes on the back. I included a variant with a gap to be compatible with my HG Graze.

The arms can pivot and and fold into each other for a stowed position. The weapon base attaches to the cannon with a slot, so future weapons could be designed and attached using that.

Hopefully assembly should be pretty straightforward. The weapon arm end parts should just slot into the front of the weapon base. See the photos for reference.