This is an older work. I'm posting it for record-keeping purposes. Created January 2020.
I wanted to use the Tristan as the base kit and add various modifications.
However, since it's a modernized version of the Alex, I thought it might be a bit larger, but that wasn't the case...
It ended up being quite different in many ways.
The main weapon is a Jegan beam rifle with a spare barrel from a system weapon attached to create a long-range beam rifle... it doesn't quite match the size of the mobile suit.

Tristan (Back Weapon System) | ガッキー's Gunpla works