Where can I find an alien gun?

Excuse me, as a professional practitioner in the field of cryptocurrency and finance, I realize this query might seem a bit out of the ordinary. However, I'm curious to understand the context behind this inquiry. Are you perhaps referencing a sci-fi movie, game, or some other form of entertainment where an "alien gun" plays a significant role? If so, I would suggest checking online resources such as fan forums, official websites, or even online stores that specialize in collectibles and props. If this is a genuine request for a real-world item, I must remind you that possessing or searching for such a weapon could be illegal and highly dangerous. Please clarify your intentions and ensure you're operating within legal bounds.