An attachment on the side of your gun, it acts as a personal radar that shows blips where enemies are.
You can have both attachments on if you unlock the gun perk that lets you have two. ie, kick, focus, attachments
it's and explosive
Yes.
15 kills with the silencer =]
ther are no controlls
Heartbeat Sensor is not a Gun, it's a Attachment for all Assult Rifles. It is unlocked by killing 15 people with the silencer.
You can't get a heartbeat sensor on a secondary weapon in the game. The only possible way is to do some sort of hack on it, which is probably not the best thing to do.
itdepends on the map but i think heartbeat sensor is awesome but some people get ninja perk so they cant be seen by it
Ninja Normal - Nonseen On Heartbeat Sensor Ninja Pro - Nonseen on Heartbeat Sensor + Dead Silence (can hardly hear your feet when u walk or run)
No, but you can stun it with a Flash Grenade, if you are talking abut MW3!
15 kills with a silencer
Heartbeat is definitely the way to go. First, UAV only lasts for a little while, 30 seconds I think; although it works all across the map. However, heartbeat sensor is always working. And although it has a smaller range, it never runs out.