The Rat King is a sleek, compact sidearm with a futuristic design, featuring a matte black finish with subtle metallic silver accents. Its body is angular yet ergonomic, with a prominent suppressor integrated into the barrel and intricate engravings resembling rodent motifs along the grip. The weapon emits a faint green glow from its ammo counter and sight, suggesting its exotic nature and connection to the game's lore.