Not sure why you would need something like this… but it is a cool gadget and must have a very real purpose… I guess. The WASP Knife ($379.95)is made to stab, something or someone, and then inject 24g of compressed gas. Ummm… ok.
“Since World War II, the military has seen much of its soldiers equipment go through many radical changes and technological advances. The knife has gone unchanged until now. Our soldiers deserve the most advanced equipment that is available to them. A simple knife is okay, but when it comes down to the last line of defense, you want something that will get the job done. Introducing the WASP Injection Knife. This easy-to-use, easy-to-reload weapon delivers up to a 24g shot of compressed gas at 800 PSI on land or underwater.”