Modern Warfare 4 DMZ: Where to Use the Blackmarket Key [Guide]

The blackmarket weapons locker key in Call of Duty: Modern Warfare 4’s DMZ extraction mode opens a locker located at two specific spots—one in the central warehouse and another in the abandoned supply depot—allowing players to access rare weapons and loot. According to verified reports from Polygon, the key is found in extraction crates and can be used only once per run. Players who locate the key early can secure high‑tier gear before the extraction timer ends, giving them a significant advantage in late‑game engagements. The locker contains a selection of limited‑edition rifles, pistols, and tactical equipment that are not available through standard loot drops. Using the key strategically can also help teams control key map areas, as the locker locations are near high‑traffic zones. For those looking to trade or sell the key, 217G lists it at a consistent price range, reflecting its value in the secondary market. The key’s utility extends beyond single‑player, as competitive players use DMZ to practice extraction tactics and map control, making the key a sought‑after asset in the community.