In the mission where you have to defuse a bomb in the sewers there are 2 hackable turrets. Has anyone figured out a way to get these outside? It would be fun to drop this outside the police station and annoy the cops.
Unless one of the manholes is low enough that you can /throw/ the turrets out, there is no way to carry them up a ladder.
In theory if you were to spend long enough gathering movable objects it would be possible to drop enough of them into the sewers to allow you to jump/carry it close enough to the manhole to throw it out.