I show here that the Scorpion has only 550 range, which is troubling considering the power it consumes.
The Disinfector 3 has really short range too but takes less than half as much energy as the Scorpion.
I think the extra energy consumption in the Scorpion is at least in part going to the increased muzzle velocity (700) which does make it a more accurate weapon, but perhaps not enough compensation? I don't know, 700 m/s means your gun doesn't match up velocity-wise with any of the codename weapons including the new SOLARIS.
You could do 4 scorpions and 2 missles, but I know you are a gun man...