This is UR-025, one of the 8 heroes available to play in WQ Blackstone fortress. He is an aged imperial robot under the service of the Adeptus Mechanicus.
Because he is so large he is unable to move as fast or use cover like the rest of the heroes. However he makes up for this with greater firepower and improved defenses. Essentially he is a walking tank.
In the game's we have played he is a popular choice amongst my friends due to his raw killing power. Not to mention the painted model is quite thematic.
Enjoy the pictures of my UR-025 below. As always please feel free to comment or ask any questions you may have.