Got this done by  PYC-Art

"Spectre, you've got eyes on target?"

"Yes, I do. 1300 meters, windage 19kph from the south and the building effect is screwing with accuracy. Now get your ass out of the way so I can fire this gauss rifle."

One means of assassination: Sniping.
Delivering the wrath of God from up to 1500 meters and removing a person instantly. It's one of his preferred methods due to simply not being anywhere near his target and avoiding most security measures. Silenced weapons can be highly prudent due to noise reduction, especially with subsonic rounds, but some clients want a... louder response. Hence assault cannons and railguns for vehicle cannon level death.