This is an action toy, with some die-cast metal parts, of a science fiction/anime character or item.
Here's another sharp variation of Aoshima's Shin Seiki Gohkin Getter-1, from "Change! Getter Robo: Sekai Saigo no Hi" (a.k.a. "Getter Robo Armageddon"), complete with full mantle for charging at the Invaders as seen in the OVA series! Getter-1 stands 18cm (about 7 inches) tall, is made of die-cast metal and plastic, and features a Getter Beam hatch that can open and close. It comes with two Getter Tomahawks and a left hand holding a fallen Getter G's head. Both arms are removable to place the soft PVC mantle over Getter-1. Another Shin Seiki Gohkin Getter-1 gotta-have!