If you want to make it more messy, some optional rules...
The player the former player mentioned, has to pick the gun, he will say "I PICK the gun".
But he can be ninjaed...
Another player may SEIZE the gun if the guy in waiting still did not PICK the gun... On condition that an additional bullet is added. If there is a click, the game goes on as usual. If there is a BANG, the mod puts just one bullet for the next round.
It is possible to SEIZE the gun after another guy SEIZED the gun and clicked... Therefore there will be THREE bullets... rinse and repeat if people dares.
The endgame might be interesting as there are
options for the daring.
These optional rules might speed up the game. If you do not want anyone to stall the game, then elinimate the PICK command. Whenever the appointed player did not say they PULL, anyone can SEIZE the gun. If the guy who seized the gun takes their sweet time and does not appoint a sucessor and PULLs in the same post, it is possible that another one seizes the gun themselves. Super messy and super fast.
Also, the mod can PULL for the appointed player after the number of hours indicated since they got the gun, if they did not PULL themselves and no one seized the gun in the meanwhile. If no sucessor was indicated by the player in charge of the gun, the mod might appoint one randomly. With this, games might become as fast as you want. But people might want to seize the gun. Once it has two bullets, you will get a bang soon enough. More with three.