Is this illegal in the state of Maryland?

During this summer i was thinking about buying this and hanging out with my friends, Im 13 and i need to know if its legal or not. Also can it be seen in public? here is the thing i want: a href="http://www.amazon.com/Top-Swords-Claw-Dagger/dp/B000STH9WK" rel="nofollow"http://www.amazon.com/Top-Swords-Claw-Da…/a