Science Fiction Stack Exchange and some other Stack Exchange sites are currently running a game called the "Winter bash" where users can earn "hats", overlay images they can add to their user avatar. One of these awards is called "Werewolf Hunter", and is awarded for gaining a silver badge within the holiday period. The image for this hat depics a hat and what looks sort of like a crossbow (see image below).

What does this image really represent, and how is it connected to werewolf hunting? Is this sort of hat and weapon worn by a particular famous werewolf hunter in some piece of fantasy fiction?

Yes, I am deliberately asking this on the main site of SciFi SE (not on meta), because I'd like to know about the pop culture references this is trying to evoke. I could ask the same thing here if some website unrelated to SE gave such an award.