I'm not sure it's appropriate for the mining laser to have fortune iii, especially if it takes 1 less iridium plate to craft it than it does to craft an iridium drill. Also, how often do you find enough fortune-compatible ore in one line to justify using a mining laser for it?
However, I like some of the other details, like the higher damage, energy capacity, and presumably penetration distance when used in mining or horizontal mode (scatter and explosive modes might be too powerful if scaled up).
scatter and explosive modes might be too powerful if scaled up
When it has quantum in the name and is powered by EU, there is no such thing as too powerful 
But the ideas are nice. Expecting a nerf to the normal one, maybe removing some of the modes like explosive unless the price of the quantum one goes up.
I see there is plasma-rifle, accessible in creative. Maybe its a prototype? 
It's a very early test if it is one, it explodes really really violently in water, and the explosion force seems to change depending on how it's fired.
I tried in water and it only seems to disintegrate it...
