They didn't seem to target individual subsystems. A pair of size 2 torpedos did about 33% damage to an Anaconda. Also, they are bugged where they say they can hold 4 shots each and you can buy 4 shots, but you can only use 2 before it says you are out of ammo. So, I suppose not bad for a trader or something who could pop off a large ship before they even knew what hit them, but for bounty hunting, they are a waste of time.