Don't know if you guys have seen this guy, but I think it's pretty awesome anyways.

2882105 I've seen this! This was really freaking awesome.

Okay, I WANT THAT HIDDEN BLADE!!!!!

2882105 boys, observe. This is what a real man looks like.

Only problem I see with it it that the blade doesn't retract. Once you launch it, it would need to be manually pushed back down.

2884111 He said the guy was a gunsmith, so they probably juryrigged a mechanism not unlike something in a gun to hold the blade, then release it back into the "sheath".

2882105
Pffff I didnt excepted less from him.
I mean look at all the other shit he made.

2888479 True, my personal favorite was his sting replica.