Check Your Fire!!!

[Spec]

If you have a gun with tracers you can try to shoot in the air so he notices that you got the same tracer color. Though thats not a serious option, since it gives away your position... But rather compromised than dead...

Still, a "check your fire" voice command would be pretty badass.

[jaspercat444]

Even better, with the "Team Damage!" thing in the bottom left corner, there should be a "Cease fire!" voice with it. So lets say Marine Joe was walking around Kashan, and he sees a soldier. He hits the dirt and begins firing. But OH NO its Marine Fred! So Marine Joe will get the "Team Damage!" warning message, but he won't see it. But of there was sound that only you could hear then that would work. Like the little "blip" when you request a kit, but a guy saying "Watch your fire!"

[lord rifle]

solution:
push "k" (team chat), and type: FF!

i do this and it works good