Unfortunately, that may mean that you won't be able to equip the non-player beam to any wingmen.
I was originally hoping that the Source Code team would allow a -1 option for beam duration, which would enable a variable duration beam. That way we could retain the warmup and cooldown time and sounds, and avoid the somewhat off-sound for the multi-shot beam. Beam fire would continue for as long as either the player has the fire button depressed, or until the weapon energy runs out. Speaking of weapon energy, there would need to be a change in weapon energy usage for such a weapon so instead of a per-shot basis, it would be on a per-second basis or something.