Bullets will work fine but I wonder if automatics would.
Actually I think if anything the Harpoon Guns would work.
But then again the Power Armor suits should work too since they're a very finely crafted and they're exosuits. But while they did used to work, they made you basically invincible against anything going on in space, and the point of space is to make you feel naked, so it was a Game Balance issue.
Making you use Lasers and Rayguns in space forces you to use expensive and rare ammunition to get anything done, and others up there use lasers so your natural armor means nothing (plus you get set on fire, or its zombies tearing you apart - so all injuries are horrific). Can still use Melee very well, and thats preferable on a space station anyway.
Frankly, anything you find in space can be and should be fried with lasers.
Nerf Laspistol is common and regular Laspistols are easy to get off of academy medics. And there's the Laser Tommy which does Burst 5 too.
The only worry is Terminators but thats a risk/reward mission. You can just Abort and it takes down the disruptor satellite (you ram it with your ship). Regular Lasguns do 48 damage now and its enough to torch them... in exchange for maybe eating 2 adv/clips you might get 3-4 Nuclear Batteries... which may produce a whole iron man suit for your slave soldiers in Year 3.
It's basically trying to find a solution to a problem that doesn't exist. You likely dont have orbital capability yet (pachyderm) if you haven't by then racked up some lasers. And guild or academy people in the stations - you should wrap a hose around their neck.