1. Particle Cannon:
    The Particle Cannon first appeared in Wing Commader II: it provided long range and high damage potential at a fast rate of fire. Most of the Terran fighters were equipped with this gun, including the Rapier, the Sabre and the Epee. In WC3 the only Terran ship equipped with this gun is the Longbow bomber which has got a dual Particle cannon rear turret, providing a great defense from rear attacks by light and medium enemy fighters. In WC4 the Hellcat and the Longbow have this gun, but it isn't as powerful as in the previous games: its range, fire rate and damage potential have decreased, making this gun not particularly effective.

  2. Tachion Cannon:
    This weapon is every fighter pilot dream: great range, very high damage potential and fast firing rate; obviously the downside is that the Tachion cannon chews up your power reserves quickly. The first fighter to be equipped with this gun was the Excalibur (in WC3), but in the following years many ships were designed to be armed with the Tachion cannons, like the prototype heavy fighter Bearcat or the Black Lance fighter Dragon; even the Vindicator medium fighter in the Border Worlds fleet.

  3. Spiculum Image Recognition missile:
    The Spiculum Image-Rec missile is the deadliest among the Confed and Kilrathi arsenal: its warhead requires a few seconds to lock on a target and memorize the ship type, then you can launch it and the Spiculum follows the target until it's outpaced or it hits. The warhead causes a lot of damage, so I find this missile very useful to finish off an enemy: knock down shields and armor and fire a Spiculum to the exposed side of your enemy to quickly terminate him.

  4. Leech missile:
    The Leech missile first appeared in Wing Commander Academy and Wing Commander Armada as a particular warhead available for the Wraith medium fighter only. The Leech tracks an enemy and once hits, it drains the target of all its energy leaving it without shields and therefore vulnerable. In WC4 the Leech was subjected to some improvements, that made it able, not only to drain the enemy of its power, but also to leave him as a "sitting duck". The Leech is very useful especially when you have to fight against a crowd of fighters: disable a couple of enemies with it, then deal with the remaining foes!