M4A1-S | Nightmare is a haunting centerpiece for stealthy loadouts. Released in August 2018 with the Horizon Case, it gives the silenced M4 a chilling, storybook-horror makeover. This M4A1-S has been painted in a Custom Paint Job” style, with the Nightmare finish: a ghostly creature with glowing eyes spreads across the receiver and mag, while spectral feathers and claws streak in electric blues down the handguard, stock, and even the suppressor. Midnight-violet shadows keep the silhouette readable, and faint gradients along the can and buffer tube add depth without clutter. Pattern index can shift the placement of the creature and feathering, giving each piece subtle uniqueness. In Factory New condition, the artwork is immaculate—no scuffs on the suppressor’s rim, no edge wear on the carry handle or magwell, and the neon blues remain razor-crisp and luminous.