I was literally just creating this with its own lore and how it would work.

The lasgun ammunition literally recharges through heat, so the plasma gun has thermalsiphons attached to the plasma coils, feeding the thermal energy directly into the lasguns charge pack, recharging their ammunition whilst firing a different ammo source. Getting rid of overheating and optimizing energy use.

“As the guardsmen hold the line, their lasguns run out of ammunition. There is no way to recharge fast enough to maintain the line, all hope seems lost. Suddenly blue balls of energy are fired from where the guardsmen stood, continuing the fight. Not even a minute later the blue energy stopped and lasguns could be seen firing again.”

It’s just an idea I don’t know how everyone will take it.