Any requests?

[PutraenusAlivius]

How about a flintlock rifle, as a decoration.?

Absolutely,no! Seeing the flintlock as a decor will still make the player to think;
"HOLY SHIET! A GUN! FINALLY I CAN KILL MONSTERS!"
Although, the player will be dissapointed when he/she founds out it can't be hold, or picked.

Put it behind a bullet proof display?

It still makes the player to think that stuff. And besides (if i'm correct.(, bulletproof glasses weren't exist in the 19th century, as nobody invented them. Heck, bulletproof suits are not even invented yet!

Solution: Just make it broken to pieces. This will loose some of that little flame of hope in the player's heart.