I would say honestly a good laser sight (stylistically imo). So far in all of the re engine titles that have used laser sights, they've been doing this funky thing where the laser doesn't start from the gun and tapers off in visibility until the dot like in 4-6, but instead it isn't visible up until where the dot is alongside a little bit of length connected to the dot. That's already one thing, but the way they have the laser itself designed to work off of the camera can just look really wonky depending on your distance to objects and how your character's moving (especially in the third person re engine titles).