A lot of equipment is just variations on basic themes. If equipment too could have modifiers that change their weight and/or cost and come with the usual Freatures - that would solve a lot of it.
If my ammo can be any combination of, say, 'streamlined', 'explosive' and 'homing', that makes for (if my quick maths is correct) 7 listings to choose from. Instead it could be one with three potential modifiers. Same goes for how fancy clothing is, what material armour is made of etc.