Ok. So, its a simple idea. Maybe more than half the people here don't want this or just don't care, but I can still ask.
Its simple. Just a beam from your hand. No models needed.
When you have the iteam out, your hand has smoke emitting from it showing others you have it out, and just for looks. Then, activate and it shoots. It can be shot instantly but if you charge it, it gains range, size, power, and knockback.
As you charge, there is a ball on your hand. As it reaches the 3 points in time, it grows. Start charging, fits just around your hand. 2 seconds, 1.5X bigger. 5 second charge, 2.5 bigger than the first size.
Instantly shoot: Similar effect as a weak shotgun, you back up a bit and take about 30 damage. For hitting builds, it can take out about 2X3 bricks and smaller.
Charge 2 seconds: Power like a grenade, but the spread of the impact could only hit maybe 2 people. Can take out 2X4-2X6 bricks within the distance of about 3 Blockheads.
Charge 5 seconds: Can kill about 5 people standing in a row from side to side, if hitting the middle person.
And finally, after shooting, regardless of how long you charged, it takes another 5 seconds to be able to charge and fire again, showing such with fire emitting from the hands, rather than the smoke.
The color and sounds don't need to be anything specific, the idea is just what it is, light that makes big boom.