I play multiple games that are realistic like socom, battlefield, PUBG and there's some few things that need to be intimated in forefront and that is

#1
[Sniper rifle scope mils]:
Add different scopes for sniper rifles You need scopes that have
mills" so this way you can see how far of a lead or bullet drop you need to adjust to hit your target

2#
[Sniper OHK long distance ONLY]:
(Also all sniper rifles should do massive damage the longer the range and weaker damage close range this has been applied in multiple games If you see a target 200m+ It should be a one-hit kill I've been hitting people at 500 m out and I still have to shoot them twice The bullet lead and bullet drop is so crazy I should be rewarded a one hit kill making it to less damage close range would make sense so people don't use it like a shotgun)

#3
Add recoil on the lasers
(It makes no sense You can use a red dot or scopes on your weapons It has recoil and sway making it a little bit more difficult to kill your targets but yet using a laser is more efficient even all the way up to 100 150 m away That's a joke Lazer should also recoil

#4
I have no problem with people that Bunny hop in the middle of gunfight but You should add more recoil on weapons and lower their accuracy if they're going to bunny hop That would make it more realistic If you're jumping up and down constantly you're accuracy is going to be off and making the gun not so accurate why do you think people don't do it in real life Also other developers applied this method as well making weapons unaccurate while bunny hopping.

5#
[Jumping out of ground moving vehicles]:
If you're going a certain moh say 20+mph and you jump out of a moving vehicle you should die, Other games like PUBG apply this especially for game balancing.
(I'm cool with people putting c4 on vehicles to take out tanks and stuff but it's kind of cheap that you're able to jump off the vehicle at good speeds and don't die If you're going to see for vehicles and you jump off to go click it you should die for jumping off the vehicle or just suicide with the vehicle
It's unrealistic and it's cheap to be able to go at 20Mmph+ speed and then jump off and not die this would also balance the game Make people think twice don't want to c4 vehicles because then they have to know that they're playing their life on the line