1x sights dirty and tinted
1.5x Iron sights: not as easy to track moving targets
2x blurry (Possibly the worst sight ever)
3x clean sights but will put you at a disadvantage in CQB.
Medic sights a little unclear, tinted.
Support 1.25x sights no thank you.
Dice it maybe scummy thing to do but I wouldn't mind paying boins for nice clean Kobra or coyote sights if you can port them to BFV because as it stands BFV is the worst game I've ever played in terms of visibility and all of its sights contribute to making visibility worse.