This is a posable, high-grade or better injection-plastic kit of an item from the Gundam universe.
Bandai's "BB Senshi" line of SD Gundam kits (SD stands for "Super Deformed") are cute little interpretations of machines from the various Gundam anime series. Kits are molded in color and feature easy snap-assembly, suitable for young kids. Stickers are included, too. Finished kit stands about 5-6cm high.