Board Thread:Questions and Answers/@comment-10622371-20130609004714/@comment-6034641-20130609020329

First of all, make sure you have it equipped and do not have extended afterburners equipped in your secondary slot.

Second, when flying in the Reaver, hit your secondary weapon key (2 by default). When you get closer to an enemy fighter, aim your crosshair towards them and you should see it start to lock on. When you see the indicator that it is locked on, and hear the tone, fire away.