What about a new mountable that makes the heat bar cooldown faster?
This mountable will work almost similar to the Heat sink’s but it got a different way to help:
It makes the weapon cooldown faster when is not in use or is overheated.
They are mounted close of the heat sink the heat sink.
And probably useless because Coolant Canister Exist
Could probably be also a stackable like Coolant canister instead of mountable