Locations of weapon crates in Headstone Mine.
Location 1 (White Chest)
Area where the first large group of bandits are fought, inside a building to the right.
Location 2 (White Chest)
Taking the stairs up an turning left leads to another building with a white chest.
Location 3 (Red Chest)
If the main staircase was used and after getting through a small group of bandits, another building with a red chest must be passed through.
Location 4 (White Chest)
At the West edge of the yard covered by Gatling Turret there is a small building. When approached, door on this building will open up with some bandits rushing out. White chest can be found inside this building.
Location 5 (Red Chest)
After the MK2 turret and taking left turn, there is a building to the right with a red chest.
Location 6 (White Chest)
There's a building due North from the chest #5. Going through that building and turning left on a mining cart track leads to a white chest.
Location 7 (Red Chest)
This red chest is on top of the second building, which can be accessed through a grenade jump or by jumping on a scrap metal roof on the other side, then crouching to avoid falling onto the ground. Follow the path and a red chest should appear. This red chest has a greater chance of containing higher-levelled weapons or occasional class mod.
Location 8 (Red Chest)
On the way to Sledge, there will be a red chest next to the elevator. This chest cannot be missed.