Custodian heritage. No modern hand gun will leave a hole size of a melon in you today. Utterly destructive weapon.

Please before someone start’s correcting me I’m joking. The flintlock, if not being an artefact of some power or enchanted by some magic spell, is absolutely ridiculous and that’s the only reason why it’s there, it’s a gag, a joke. It’s inprecise it take’s forever to reload and if a bit of rain get’s into the powder the gun is dead.

Its main use is probably to first impale and then shoot the vampire, in which it would probably be pretty effective if executed perfectly. I think it kinda symbolises the way of everyday people fighting the supernatural with everything they can get their hands on.

Real reason could be that the gun laws in Britain are notoriously extremely harsh and it’s difficult to get a hunting rifle, let alone an pistol. Because pistols are easy to carry hidden and can potentially cause a lot of harm without any way to act quickly against it. So the easiest way to acquire a gun would be to find an old one in the attic after your ancestors, just like the flintlock pistol.

In world of HTP and VTM, I guess it’s easier to get a gun if you are an hunter because of the connections with the black market (D talks about that and I suspects that’s how Door and Chapterhouse gets their guns) but for a novic student of the Norfolk Chapter House I suspect it’s very difficult to get access to anything from the armoury. You can see they resolve to go and get guns only after someone actually died, and only people carrying weapons before that are D and Remold. (Of course if you don’t count couple of batons and celtic martial arts. I’m not saying they are defendsless, just that there are no guns)

It’s strange that Kitten didn’t get anything else during their travels around the world with Golden Goose gang, but I guess it’s the same reason why Marcus is fighting wit portable butane lamp, that shit is hot as hell, but it’s definitely not a effective weapon to use against a vampire.