The Germans developed a night vision system and put in a StG44. The Z1229 Vampir system.
That was a prototype system. It was never used in the war. But as we see a lot of weapons that are prototypes, I think this could be a good idea in dark maps.
The battery for it could take up your backpack slot so you’d have the advantage of better low light visibility with the disadvantage of not getting extra ammo or medkits, it was super heavy too so I’d imagine if it was implemented it’d lmg levels of heavy