Is there a mod that makes ME2 weapons into ME1 (heat-based) weapons?

[CompanyofHeroes_thankSpielberg]

I am not used to Mass Effect 2's weapons, because needing ammo gives me ammo anxiety. I am afraid of firing too much and thus running short of ammo.

There was no such worries in Mass Effect 1.
I really wish to have the Mass Effect 1 weapon system in Mass Effect 2.
Is there a mod that does that?

[Sultryhag]

You will never run out of ammo. In the Legendary version they are strewn everywhere and you can always take a few steps back to get a spawn of ammo if you're OCD about being full.

[Ellen]

https://www.nexusmods.com/masseffectlegendaryedition/mods/71/

Probably this would still work, originally the game was supposed to use a Hybrid system, where the gun cooled down and you only ejected the thermal clip if you spent too much shots. Likely it became too tough to balance.
I never tried it myself, especially with the Legendary edition, but it is worth a try for you.

[Mr_Faorry]

Yeah there is.
https://www.nexusmods.com/masseffectlegendaryedition/mods/1817
It'll make them work like in ME1 where it cools down over time (represented by ammo regenerating) but still allows you to eject the thermal clip if the gun overheats (runs out of ammo) in order to remain consistent with the codex lore.
There's an ME3 version too.
https://www.nexusmods.com/masseffectlegendaryedition/mods/1819

Way better than the vanilla system which makes no sense when you think about it for more than 2 seconds.