This particular clown mask belongs to Dallas, the mastermind of the PAYDAY gang.
This item is a reference to PAYDAY 2, and was added in a cross-promotional event.
However, once the three clowns are obtained, no more will spawn if further duplicates are collected.
The order of the clowns appearing when collecting the item goes: Chains, Wolf, and Houston.
If duplicates of this item are somehow obtained, further summons more clown allies.
If the player is carrying Loot Bag or Drill with the Clown Mask and drops either of these items, a familiar will be lost until the item is picked up again.
The projectiles from Chains's shotgun will be destroyed by the player's blanks.
Houston's blanks are affected by Ammolets, so it's a good strategy to buy them from Old Red or Shops.
It is the only item from the trio to give that cosmetic effect.
Picking up Clown Mask will replace the Gungeoneer's regular appearance with Dallas, a clown with an American flag mask.
Picking up Clown Mask increases the chance of finding the other Payday 2 items, Loot Bag and Drill.
The order that the familiars are acquired is random.
Every enemy in this aura will be ignited.
Tea for Two - If the player also has Teapot, when reloading Teapot, Wolf, Houston, and Chains will have a small red aura around them.
If the player carries the Loot Bag or Drill, an additional familiar will be summoned for each.
Chains (the clown with blue slits over his eyes) wields a shotgun which he will use to attack opponents.
Houston (the clown with the pink eyelids) will guard the Gungeoneers by occasionally activating mini Blanks that negate enemy bullets.
Wolf (the clown with the red mouth) will attack enemies close up with a taser, continuously stunning them.
Summons one of the following clown-masked familiars.