This weapon exists in the game files, and can only be obtained through console commands on the PC version. The gun is inside the mailbox marked "weapons" within the testing hall that is accessible with console commands (coc TestQAItems).
Durability
Wanda can fire a total of about 1250 shots, the equivalent of 42 reloads, from full condition before breaking.
Location
This weapon is only obtainable on the PC by using console commands.