This is the Bandai 5058275 BB225 RX-77-2 Guncannon Plastic Model Kit

This is a posable, injection-plastic SD or BB kit from the Gundam universe.

Bandai's "BB Senshi" line of "SD" Gundam kits (SD stands for "Super Deformed") are cute little comic interpretations of machines from the original Gundam series. Kits are molded in color and feature easy snap-assembly, suitable for young kids. Many also have little spring-loaded missile shooters that launch plastic projectiles (hands, bombs, etc.). Stickers included, too. Finished kits stand about 5-6cm high.