These are just some concepts, so please share any thoughts:

- Buildings destroyed by this item leave no gunmetal.
or
- Buildings destroyed with this item attached leave no gunmetal.

- Deals 5 damage to whoever destroys it.
or
- Deals 5 damage when struck.

With extra functionality from stock, there would need to be drawbacks as well. Maybe the health could be lower—to where one stock wrench hit could destroy it.

Ideas others have suggested which I think are interesting:
- Periodically destroys sentry ammo (and presumably dispenser gunmetal).
- Limited to 3 active sappers. (or whichever amount)
- Does not disable buildings, but decreases their functionality.

Of course the exact balancing and numbers comes down to playtesting. I'm happy to get some more ideas out here in the off-chance this gets added to the game. I'd love to see more secondaries for the spy which make him a real master of espionage and sabotage. It's a slot with tons of potential.