Tractor Beam Weapon

[Nightfall]

You're partially right Ant.
A single fighter can barely scratch the shield of a battleship.
A bomber... that's something else. But bare in mind the fact that there are two more very important facts to that: the pilot of the fighter and the pilot of the BS (well, in RP - the gunners of the BS).
Anyway, bare in mind the damage inflicted, a BS needs to get two consecutive salvos into the fighter/bomber and the fighter/bomber needs to pound the BS for a long time and dodge those two consecutive salvos.

I'll cut this short, my point is: if a BS can't hit the fighter/bomber because it's gunners are bad shots... it does deserve to be destroyed.

So, an 'interdictor gun' as I called it, would be justified, on the other hand, the capships have Cruise Disruptor mounts that fire 360 degrees, not anyone's fault no one carries CDs with them.

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If the stars should appear one night in a thousand years, how would men believe and adore and preserve for many generations the remembrance of the city of God? - from 'Nightfall' by I. Asimov
The Outcasts consider Siniestre Nube a sacred place for several reasons. Early explorers discovered a jumphole within the depths of the cloud that leads to a strange world of ringed stars and strange craft. All ships in the burrial ground are placed facing that hole to honor the Alien Spirits. - An Outcast rumor