The RGZ-91 Re-GZ comes from Mobile Suit Gundam: Char's Counterattack and is part of the High Grade Universal Century line in 1/144 scale (kit #085). It is a snap-fit plastic model kit with color-molded parts, so you can build it without glue or paint.
The Back Weapon System (BWS) can be rebuilt into its space fighter form. The beam saber rack on the back has a swappable open or closed hatch. The kit comes with a beam rifle, beam saber and shield.