Are crossbows SERIOUSLY ILLEGAL?!

So i was talking to my friends about maybe seeing if i could get a crossbow at some point, and they told me that it was illegal to own a crossbow in the US.  Now i am definitely going to look into this, because i am sure that this would violate our second amendment rights.  now, depending on their logic and reasoning, i might end up agreeing with whoever made the law! but only if it is REALLY logical logic!  well, i'm gonna go play a game of some sort, do something, you know, stuff. so until next time, BYE!