Or something like this! Trouble is, I'm not sure how many skills or perks could augment a "smartgun" before it starts to become cheese.
Maybe ammo count should be really low. Big thick bullets, slow-firing, perhaps relying on critical hits to be truly effective. So in a sense, it's guaranteed middling damage, or the ability to target weak points with a reliable degree of accuracy, but in order to really bring targets down, it requires reliable criticals.
Not sure how far away I'm getting from CP 2020 lore here.
Sard's thing above makes it sound like you would mostly use smartguns for called shots / sniping. From what we've seen of it in the 2077 gameplay, it seems like it's more of a mainstay weapon.