In the wiki, it says the raven missiles can last up to 5 seconds (approximately 350 meters in distance). Right now if I test them in the VR training with the Sweeper HUD implant, it stops dealing damage when i'm 50 meters or more away from a vehicle OR infantry. I also see the missiles explode on the vehicle/infantry as well, they don't "expire" before. I've tested just as much in VR training as I did in a normal fight and it has the same behavior. It makes the weapon totally unusuable in almost every situation.