Expert, Knowledgeable, etc..
Expert gunner.
Swords & guns.
pullicologist
An expert at table talk is called a deipnosophist.
Horologist
A mathematician.
A language expert is called a linguist. Linguists study the nature of language, its structure, and its use in communication within a specific cultural context.
Horologist
Horologist
Toxicologist.
The higher level you are the more guns you get
Sharpshooter is a higher class. Expert is higher still.