The Arsenal Firearms 22LR Ballistic Knife is something that would be used in a thriller movie. It has a fantastical vibe about it that just doesn't make it suitable for real life, yet it is very much real. A hybrid between a gun and knife, it is made to look more like the latter, which is what makes the design particularly impressive. Knives on guns isn't something new, but guns in knives? That's pretty unusual.
Essentially, the Arsenal Firearms 22LR Ballistic Knife has a small hole on the hilt of the knife where the blade ends. It is from here that the bullets charge out of. It loads six .22 caliber bullets and fires from a special trigger.