Erm....
I was thinking of something like this:
Name: Gravi Rifle
Bullets: Energy (Gravitron Bullets)
Spread: Same has kv24
Bullet Distance: like Erbeamer
Ammo Clip: Holds 20 bullets before reload
S shot: Shoots gravitron bullets, two at a time. (Similar to erbeamer)
D shot: Gravitron's shot? (Like gravitron)