That Looks Illegal
You must be very cautious in the online world because there are many unscrupulous characters selling items of unknown origin. The last thing you want is to buy something on Marketplace, only for SWAT and the FBI to raid your apartment and ransack the place. So, if anything says “Department of the Army” on it, you should just keep scrolling.
This is a good example of an advertisement you should avoid. This person was selling storage barrels that supposedly came from the US army. Now, we’re not experts on the US military, but we’re fairly certain that you wouldn’t want to take home a military-grade barrel.