This may already be a known issue, but the T-55's sight (on the African Militia faction, at least. Haven't tried the other ones) the gunner's sight disappears if you change the view magnification. It will re-appear if the gunner switches to the Commander seat, and then back to Gunner. But again, it disappears if the magnification is changed. Normally this isn't such a big deal, since no one ever really plays as Somalian pirates, but I play Zeus a lot- which means lots of remote controlling units. So I often want to put rounds as close to players as possible to scare them before actually killing them. Not having a working sight makes that a little more challenging.