Mass Drivers are rapid fire, short ranged, weapons, akin to vanilla’s autocannons.
Kinetic Artillery is a medium ranged anti-armor weapon, however it has no small variant, only medium/large. Has an XL variant.
Lasers are medium ranged weapons with a large shield damage bonus. Has an XL variant.
Disruptors are medium ranged weapons that entirely bypass shields. Has an XL variant.
Missiles are long ranged fire and forget weapons. They are faster than in vanilla. Has an XL variant which cannot be shot down.
Torpedoes are high damage, long cooldown, anti-armor weapons. They are faster than in vanilla.

Small weapons are for primarily hitting corvettes, frigates, and destroyers.
Medium weapons are primarily for hitting cruisers.
Large/XL weapons are primarily for hitting carriers and battleships.

Below is a graph with the tech progression of all the various weapons.
Do notie that flak has been removed, even though it is still present in the graph

[img]http://i.imgur.com/9Uzy75E.png[/img]