This is a cosmetic DLC that adds a new accessory to Kaisar's sprite.
It will only appear on his main sprite, the CGs will remain as they are.

You can turn the muzzle on or off at any time in the settings.

FAQ

Who put the muzzle on him?
- We don't know. Plenty of people would.

Why?
- Because it's Kaisar.

Why doesn't he take it off?
- He probably forgot that he had it, like the knife in his hand.

Why is no one surprised?
- They are just glad it's there.