This is a slim Morey MK1 dagger. It comes in the original black leather sheath. The Morey MK 1 knife is a combat knife designed in 1991 by Chuck Morey, who was in the US Navy. It was the only combat knife manufactured in the Persian Gulf for use in Operation Desert Storm. Only 1000 of these knives were made. The Morey MK 1 was not a US Military issued knife, but still remains highly prized by collectors. An interesting piece of US military history.