Lord David the Denied
Mongoose
Neither point specifically states that the Narn obtained laser technology from the Centauri. G'Kar states they learned how to recreate Centauri "weapons," but doesn't specify what weapons they were, and Franklin's speech clearly indicates a bias against beam weapons.
The CG diagram of the Primus is clearly outmoded by the on-screen evidence. If it had lasers, why didn't it use them in the two incidents we see a Primus fight? Perhaps the original intention was for the Centauri to use beams, but the decision was later taken to remove them, and the old CG diagram continued to float around the 'net. After all, that B5tech website states all kinds of nonsense for ships' armament and systems, across the spectrum of races.
The CG diagram of the Primus is clearly outmoded by the on-screen evidence. If it had lasers, why didn't it use them in the two incidents we see a Primus fight? Perhaps the original intention was for the Centauri to use beams, but the decision was later taken to remove them, and the old CG diagram continued to float around the 'net. After all, that B5tech website states all kinds of nonsense for ships' armament and systems, across the spectrum of races.