Currently, the IG FAQ says the Hydra only has the 'skyfire' rule, so snapshots at anything not a flying monstrous creature, skimmer, or flyer. Additionally, anything it shoots at cannot get a jink save due to its auto-targeter. A lot of people, myself included, are hoping they add interceptor to it or at least allow it to fire full BS at both regular and skimmer/flying targets. After all, it's been common practice in regular warfare for AA guns to be using as light antitank when needed seeing as they are often capable of traversing down to being parallel with the ground.