The Supply Carnival Mask is a head added during the Carnival 2017 update. It was obtained by completing Tier 1 of Trial 1 in the event or by purchasing either the Masquerade Pack or Parade Pack bundles.
The head appears to be a brown-haired man wearing a pink mask which resembles a Tiki with a smiling expression. The mask covers the whole face besides the eyes. It has various blue, yellow, and red patterns all over it.
Along with it's 7% Agility stat, it also provides a 5% reload time reduction for all weapons, gives Parade Shotgun an extra 10% reload speed (Resulting in 15% in total), and changes Maskeleon Rifle into rifle mode and Heavy Maskaleon into Energy+Healing ammo when equipped.