Just what we need: more weapons and even better, increasingly innovative ways to murder and maim each other.  However, this one is rather ingenious.

With this G.R.A.D. $699 .22-caliber gun disguised as a knife, you can pull the trigger on the handle, filling someone with five holes and then cut them up into little pieces, or vice-versa. Check out the video of this lean, mean killing machine.

Now all we need to do is combine this with the cellphone gun for the ultimate convergence device. Anyway, this thing looks cheap, as if it could easily blow up in your hand.