WayneLigon said:There's no amount of justification you can bring to this situation that makes any sense at all, whatsoever. Unless Mr Archeologist has had a previous history of dealing with the Mythos and was a little unbalanced to begin with, there's no reason to assume he even owns a firearm, much less packs it around with him.
I dont agree. This is not correct. There are discretionary points to be spent when creating a CoC character. The archeologist may very well be a sporting hunter, who has access to and knowledge of fire arms. That does not mean that the character would saw down the barrel, or carry it around, but having the skill and interest is easily and plausibly justifiable.
The notion that archeologists dont have access to fire arms is silly. Next you will be saying that they re completely incapable of learing to use a whip, or a revolver.

WayneLigon said:The 'world of CoC' some people mention above is our world and nothing much is different about it save for the existance of such things.
Except that the Mythos is real in that world, and people do vanish into the shadows, cults do sometimes get discovered in modern New York, and things that an archeologist may have seen or experienced in his backstory, while spending time among primitive and spiritual people may have driven him to a degree of paranoia and fear. This does not mean that he has percentiles in the Mythos skill, but it is again entirely plausible that the character is willing to be proactive in his preparations.
Of course if the player did not put any such thought into the character, and there exists no such backstory to explain his choices, especially walking around heavily armed in NYC, then there is ample reason to question the validity of his tactics.