In MW4 DMZ, the Door Breacher Charge is a one-use answer to a locked door, not a key you can carry from raid to raid. It matters because it opens rooms that normally demand a high-tier key, and those rooms often hold strong rewards. The catch is availability: there is no fixed spawn, so you cannot plan every run around finding one. If you are testing routes in MW4 Bot Lobbies, use those runs to...