Recoil in space is dependent on the mass of the object vs mass of the ship firing it. Energy weapons would have no recoil (their main benefit for use in space, aside from using energy instead of massive amounts of ammo). Any projectile fired would be relative to the ship. So it would not likely recoil the entire ship back but simply stress back on the area of the ship its fired from. That would be like making your mortar or missiles cause a bit of hull damage each shot. Maybe not missile since they can fire after launched from the ship. So unless you want to start denting your own hull with each shot, probably not worth the trouble.
Besides in theory there are ways to absorb recoil by directing the reverse force back out (perhaps in the form of gasses being vented).
I think any sort of electro-magnatic weapons do generate recoil, but I would think that it is small enough not to effect a ship so heavy anyway. That and dampeners. And magic. And magnets.
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Torpedoes and missiles might have slight recoil, they're propelled by a type of combustion engine.
Though typically, I believe on FL ships, they are dropped in space outside of the ship, THEN the propulsion system activates, honing in on the target. But still, there might be some slight shockwave from the back blast of the ignition of the engine.
May be missiles and torps being launched in Gauss cannon way? Torpedo get's first impulse, and first acceleration, leaving launching tupe/shaft or something, then, outside of a ship, burns her engines, to follow target and perform basic maneuvers.