This is the Bandai 1/144 HGUC Sinanju [5058813]

Behold the HGUC Sinanju! Bandai has performed a bit of magic by introducing the Sinanju, previously exclusive to a 1/100 scale Master Grade kit, now available in a 1/144 scale High Grade kit. This special HGUC preserves many of the distinctive features that made the MG version stand out, including movable thrusters on the legs and backpack, a Grenade Launcher that attaches to the Beam Rifle or shield, and Beam Axes that can be affixed to the shield. Notably, Bandai goes the extra mile by providing an additional set of hands molded in a fist-clenching form, a feature absent in the MG version. To top it off, the gold trim has been taken care of with a set of gold foil stickers. Enjoy the ease of snap-fit assembly, with no need for glue.