What we were able to find out about this thing is that it’s a laser weapon with output energies (that's output, not total power in the system) ranging from 75 kilowatts all the way up to 300 kilowatts. To put that in perspective, about a year ago we wrote about how Lockheed was using a portable fiber laser to shoot down rockets at a range of 1.5 kilometers using just 10 kilowatts of power. Suffice it to say, 300 kilowatts is rather a lot. The weight of the system is dependent on its output power and the number of shots you want, but General Atomics engineers say that they’ve gotten it down to just 4 kilograms per kilowatt.
So for 300 kw that's around 2700 pounds. And small enough to be vehicle-portable. If the power supply actually works, well, wire that sucker into the firefinder radar and you can shoot skeet with incoming missiles and shells. And enemy aircraft or drones... assuming the hype is true, it's not a Slammers powergun, but it'll do.