From what I recall their guns were pretty spread out.
In any case, it's sort of hard for me to get excited about Freelancer mods, seeing as how very few of them were meant to improve the single-player experience.
IIRC, Evolutions did by adding tons of new stuff to fly and a few new places to go. They also fixed that annoying issue of Liberty only having level 2 weapons. With the mod the weapons level is proportional to yours.
Here is a mod (I haven't tried it yet) you might be interested in since it appearently does make an attempt to improve single player experience.
http://www.discoveryfl.com/The award-winning Discovery modification was designed as a full-scale expansion pack for Freelancer. It breathes new life into the familiar PC game by adding lots of new features without taking away the atmosphere and balance of the original. Discovery allows players to develop and explore far beyond the reaches of unmodded Freelancer, both in multiplayer and in singleplayer modes. The modification adds 68 new systems, 152 new ships, hundreds of new weapons, equipment and commodities, new factions and NPC encounters, its own storyline, and much more - everything seamlessly integrated into Freelancer universe. View distance limitations, 1 billion player credit limit, and 10 million item price limit are all things of the past for Discovery
Give it a shot and let me know how it goes.
EDIT: Looking at a website I found how many guns each type has:
Rheinland battsleship: 19
Liberty dred. : 11
Kusari battleship: 20
Bretonia battleship: 12
To give some perspective a GVD Typhon has 15 turrets, a Hatshepsut has 30, a GTD Orion has 16, and a Hecate has 27.