A Call of Duty 4 perk. Unlocked at rank 11. Keeps you hidden from the UAV(radar) unless you fire a non-silenced weapon. Combine with the Dead Silence perk as well as a silencer for a stealthy custom class. Weapons like the M5, G3, and M4 can be extremely lethal if coupled with this perk, as the enemy will have a hard time spotting the attacker.
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