Hidden Blade Xiphoid (Assassin's Creed Much?)

Inspired by Assassin's creed and http://exoticautomatic.com/, I decided to make my own gravity powered xiphoid.  Though it doesn't seem like gravity is ideal, it allows me to retract the blade. And If I really want to, I have slots to mount springs. Tell me what you guys think, it's my first metal working project! (also, I may replace that metal piece with an actaul blade eventually, so that I can uh... do some cool stuff ;)

NEW DESIGN: https://www.instructables.com/id/SA-OTF-Xiphoid-MK-IV-Arm-Mounted-Blade/?comments=all#C8H80HTGB5HE7GW