Buzzers can be spawned by Assaults in Crossfire Mode
Running by friendly turrets can help kill buzzers
Buzzers never come alone even in Crossfire, so if you see one Buzzer, expect to see more following suit.
If you are playing as an Assault in Crossfire, and you have some spare cash, invest in a Buzzer swarm because if you're lucky, you may get an extra kill.
Rapid fire weapons such as the Assault's Assault Rifle or the Gunner's Minigun, can easily take down Buzzers.
The Supports heal/hurt gun can take them down in one burst. Good for when you are separated from your turrets.
It's usually never a good idea to slash at the Buzzers as the Assassin as you may inflict the damage upon yourself.
Buzzers make a distinct buzzing noise like a swarm of bees, if you hear them find some cover or a turret to have a better chance.
If the enemy team is hiding on higher up platforms than you, you can scare them off with a few buzzers
If Buzzers explode near a Moneyball or the opposite, the shield might get breached, leaving it vulnerable. Although, as they often get stuck, this is not an issue in crossfire as of now. This is more likely to occur in The Scramble, where they'll target the Moneyball if there's nothing else to attack.