Call of Duty: Claymore

Claymore
The Claymore is an Anti-Personnel Mine used by the United States military. It was named after a large Scottish sword by its inventor, Norman A. MacLeod. It features in both the single player and multiplayer in Call of Duty 4: Modern Warfare and Call of Duty: Modern Warfare 2 as a player set explosive. In the multiplayer, it is unlocked at Level 23 in Call of Duty 4: Modern Warfare, and Level 31 in Call of Duty: Modern Warfare 2.

Not just for kills, Claymores are often also used as an early-warning system that enemies are coming. They are now also temporarily disabled by enemy Stun Grenades and Flash Grenades detonating nearby (and grenades thrown by the person who planted the Claymore). Deactivated Claymores will spark and smoke a little. After about 5 seconds the Claymore will reactivate and will explode as normal when triggered. Additionally, Claymores are immediately placed when the equipment button is pressed, instead of being drawn with one button press and placed with the primary fire button, as in MW1. This means Claymores can be placed as a last-ditch reaction when the enemy is rushing, which can be a good way to get a kill from beyond the grave. If you have a Claymore placed and you die, it will disappear once you respawn, so if you died from an enemy that is near your Claymore, you may want to wait a little bit before you spawn; you may just get a kill.