I really like the design of the Weapon, which is a reference from other machine gun (hp-7.62?), making it special from other Heavy's main weapon.

Really make you feel like military heavy


Stats:
When start heating the gun, heavy's movement speed won't be decrease for a 3~5 second.
This effect will be shorten to 1 second after first shot.

Accuracy +25%

silence killer: no sound when heating

Overheat: After continuance shooting for 3 second, the fire rate and accuracy will slowly decrease, largest decrease will be Fire rate -20% and accuracy -50%



Goal:
Since is might be a reference from "Rambo", the weapon should be able to do a "strong" and "surprise" attack against it target in close rang. To make balance, it shouldn't be able to use in long rang or stay in long time battle.


Positive Stats: Heavy probably is the best class for ambush: mini-gun, doesn't matter which one, can destroy anything in front of it in matter of second, so how are we going make this weapon special when its master is already good at its purpose?

Add speed! making it able to chase down the running prey down and give heavy some mobility on the battlefield.

Also making sure the weapon can efficiently take down its target, I suggest to add some accuracy, letting heavy able to focus on taking down one important target.

Negative Stats: so knowing this weapon is very strong at the start, maybe we should make it a little weak when it is at the later states.

Decrease fire speed and accuracy after a few second of firing , making it hard to keep dominate in the fight, can be describe as overheat.