There was once an option in the Settings to bind a key to the Quick Chat (ie: Need Ammo) and since the second to last update, it’s no longer there.
Futhermore, this option was missing from the original keybind settings menu before you even connected to a server. The only way it was visible was to connect to a server and then bring up the settings.
That made no sense. Now it’s entirely gone from the settings menus, but my keybind is still active from when I first set it.