It deploys a booby-trapped care package to the map, similar to packages that are hacked using Hacker Pro in Call of Duty: Black Ops. When an enemy player tries to pick up the package, it will usually (but not always) tell them that it is a high level point-streak from the Assault Strike Package, like an Assault Drone or a Pave Low. The moment an enemy player finishes capturing it, it will emit a loud beeping sound before exploding violently, killing anyone close to it. The Escort Airdrop point-streak comes with one Airdrop trap, along with four Care Packages. However occasionally the Escort Airdrop will drop an additional care-package instead of an Airdrop Trap. The Airdrop Trap was first spotted in Call of Duty: Modern Warfare 3's Multiplayer Reveal Trailer. The faction announcer calls it an "Explosive Decoy." When playing the gamemode Drop Zone, Emergency Airdrops and earned Care Packages can drop Airdrop traps.
It should be noted that players using Riot Shields can attempt to claim the Trap without fear of death. It will explode, but the Riot Shield will absorb the blast. If the player has a Ballistic Vest on, the triggered explosion won't be fatal.
Having the perk Sitrep is extremely useful in identifying Airdrop Traps as the crates will flash bright red, although on the Wii version white skulls are painted all over it.
Even if a player has the perk Blast Shield, the explosion will still be deadly.
The lowest pointstreak the Airdrop Trap will offer is the UAV Recon
If killed by the falling airdrop trap, the killcam will show the player the Little Bird helicopter dropping an Airdrop Trap.
It is possible to survive an airdrop trap by claiming it on the very edge of its claim radius, and sprinting directly AWAY from it as soon as it begins to beep. Damage will be taken, but it will not quite be lethal.
Airdrop Trap shown in the Call of Duty: Modern Warfare 3 Multiplayer Reveal Trailer, note the Navy SEALS insignia.