Does anyone know how to get Mercenary Backpack in the A6 Polaris map?

Mercenary Backpack, can only be obtained with clearance administrator privileges?,I saw someone carrying this backpack while playing on the server。I’m pretty sure that person doesn’t have administrator privileges
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They must have gained it from an admin because as far as I know you cannot get in vanilla. Are there any mods on the server?

there is a normal merc backpack but this isnt it i dont think, either the player is an admin, or killed an admin for it, or an admin gave them one, the normal mercenary backpack is identical beyond rarity and craftable with i think 1 bevlar and a military backpack, for the mythical rarity one it has to be spawned by someone with privs though