Marksman (perk)

Marksman is a Tier Three perk in Call of Duty: Modern Warfare 3.

Call of Duty: Modern Warfare 3
Marksman identifies enemy targets at a longer range by showing their player names at a greater distance. The Pro version allows for longer hold breath period, similar to the perks Iron Lungs and Scout from previous games. The Pro version is unlocked at 50 kills while using Marksman and holding breath.

The Pro Version of this perk can be unlocked by simply holding the "hold breath" button while aiming down the sights of a weapon, regardless of whether that weapon can hold breath at all. (Confirmed on Xbox 360 and PS3)