For every 9 year old reading this: IT ISNT A ♥♥♥♥ING TAUNT KILL. NO TAUNT KILLS SHOOT IN THE AIR! EVEN WHEN HE DOES SHOOT AROUND, THAT DOESNT MEAN IT SHOULD BE A TAUNT KILL!
Anybody else:
The backpack icon has that little pocket on that cosmetic,
even though it isnt on the default heavy model.

The backpack icon acts if the shirt below the vest on the bottom of it is actually his skin.

Where does he put his gun?

The backpack icon has no... eyebrows...

The fingers kinda clip into the gloves.
I suggest trying to put the fist taunts animation for the fingers onto this taunt.

Does it return to the gun animation?
Shouldn't it be returning to anything he has equipped?

Why does he bend a bit back to do it,
It looks like hes gonna fall!

The collar bone goes a bit to high when he laughs.

And many more to mention.