Four codenames are worthless on fighters. They eat your energy faster than an American in McDonalds (no offense meant). They are best on bombers, but if you really are fighting a bomber (and you're in a VHF or lower class), then you should be depending on your agility rather than your guns.
Codenames are not an essential for PvP. Faction guns are better for everything smaller than a bomber, codes chew too much energy. Heavy Flashpoints, the Class 9 Civvy guns, are better than them. No need to scramble for them unless you have A) a Bomber B) an Armored Transport C) a Collector or D) a Kushan Freighter. Everything else does better with guns, especially if you can't aim like an ace. A lot cheaper, too.