Stalker (perk)

Stalker is a Tier 3 perk which appears in Call of Duty: Modern Warfare 3.

Call of Duty: Modern Warfare 3
Stalker gives the user 100% walking speed while aiming down the sights. Light Machine Guns, Sniper Rifles, and Assault Rifles receive the most benefit from this perk. Submachine guns, Handguns, Shotguns, and Machine Pistols receive less benefit as their default movement speed while ADS is higher. This perk is ideal with Overkill so you can receive the full benefit of Stalker for both of your weapons. The pro version delays detection-triggered explosives (IMS, Claymores, Bouncing Betties) so they trigger within a 2 second delay, allowing players using this to sprint straight past before detonation. Also, players will hear the explosives activate if they are detected by one, so players will be notified.

An unfortunate side effect of Stalker Pro causes explosives to detonate when a player with said perk passes it but when a teammate lacking Stalker Pro passes them as well.

Survival
Stalker is available in Survival Mode as a Perk Care Package from the Air Support Armory for $4000.

Trivia

 * In the Call of Duty Elite behind the scenes: Improve video, which can be found here, the perk icon seems to originally have been an image of a stereotypical stalker. It is likely this was the old perk icon, as they designed more like the MW2 perk icons rather than those in MW3.
 * Before being patched, Stalker Pro could delay an Airdrop Trap.