Silver Fang Dart Rifle [link]
Yes, this is the steampunk sniper rifle my friend designed, with a bit of modifications. Basically it works on compressed air, and fire a spike made of holy wood coated in silver (probably also blessed by the Pope, a Rabi, a Muslim priest and Dalai Lama... u never know what religion a particular monster is).
The spike is introduced in the back of the rifle, and the lever can be pulled to increase the air compression for the shoot. Air chambers and pumps are mounted in the stock and along the barrel.
I guess it works fine for werewolf and vampire hunters, but I have no idea how far it can shoot
Modeled in Sketchup, rendered in Twilight (and killed some sparkling vampires there too...)