First of all, you should have good eyesight.

Calm psychological quality, because you will face life danger and see the enemy being shot through with your own eyes.

You also have rich knowledge of firearms and fighting, and you also have a strong body.

Moreover, snipers are not as handsome as in the game, and they have to lurk. Sometimes you have to lie down for days, and snipers often fight alone (but there are usually observers)

Whether the shooting is aimed depends on many factors such as wind direction and gravity.

In short, if you are a soldier, it is possible. If you just want to be a sniper when ordinary people play games on a whim, forget it. It's impossible. You have no skills, no weapons, and it's illegal.

Ps: it's purely hand-to-hand combat. I hope you understand that snipers don't just want to be.