In Mass Effect 1 weapons used a new heat system and did not rely on ammunition. In Mass Effect 2 this was reverted to a simple ammunition based model but there are legacy parameters to enable a hybrid version.

The effects are as follows:

-A weapon has a certain amount of shots that get depleted as usual when firing
-if the player stops shooting before exhausting the clip, the shots will recharge (like a ME1 gun cooling off)
-if the player fully exhausts the clip(the weapon overheats) the thermal clip is ejected and a new one is loaded.

In my opinion this was the logical expansion on the original ME1 weapons, but it is obviously quite unbalanced.

[VERSIONS]
There are 2 files provided:
Default (some sniper rifles only have a 1 round magazine and don't profit much from the mod)
Sniper (all sniper rifles have at least a 2 round magazine so they do profit from the mod)

[INSTALLATION]
unzip the file
copy the contained BioGame folder to: [...]\Mass Effect Legendary Edition\Game\ME2  (overwriting the BioGame folder)


Is included in one of Skellin's optional files Skellins mod

[ISSUES]
If you have issues making it through the very first door: you have to reload = expend the clip (see the video if unclear)

[FAQ]
1)If you are unhappy with the recharge speed edit BioGame\DLC\DLC_CER_02\CookedPCConsole\BioGame.ini and modify
+HeatDissipationRate=6.0f (change this value to whatever you want, lower value is faster cooling/recharge)
Be aware that this is a global setting and may result in unwanted recharge times depending on the weapons magazine sizes. (e.g. making it recharge fast for sniper rifles can result in unreasonably fast recharge for assault rifles, try to find a middle ground for your style of play)

2)The mod cannot be ported to me3 as the parameters required do not exist in the game