Mark XV or Mark 15 often refers to the 15th version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk." Mark XV or Mark 15 can specifically refer to:

In technology

In military and weaponry

Mark 15 torpedo The Mark 15 torpedo, the standard American destroyer-launched torpedo of World War II, was very similar in design to the Mark 14 torpedo except that it was longer, heavier, and had greater range and a larger warhead. It was developed by the Naval ...

, 1930 US Navy weapon plagued with development problems in World War II * Supermarine Spitfire XV; a designation reserved for use with the Supermarine Seafire *

Mark 15 nuclear bomb The Mark 15 nuclear bomb, or Mk-15, was a 1950s American thermonuclear bomb, the first relatively lightweight () thermonuclear bomb created by the United States. A total of 1,200 Mark 15 bombs were produced from 1955 to 1957. There were thre ...

; 1950s American thermonuclear bomb * Mark 15 Phalanx CIWS; automated anti-missile gatling gun, entered US Navy service in 1980 * Mark 15, a variant of the

8-inch/55-caliber gun The 8"/55 caliber gun (spoken "eight-inch-fifty-five-caliber") formed the main battery of United States Navy heavy cruisers and two early aircraft carriers. United States naval gun terminology indicates the gun barrel had an internal diameter of ...

* MK 15, the US military designation for the

McMillan TAC-50 The McMillan TAC-50 is a long-range anti-materiel rifle. The TAC-50 is based on previous designs from the same company, which first appeared during the late 1980s. As of 2017 it holds the record for the longest confirmed sniper kill. McMillan mak ...

Other uses

* Mark 15 and Mark XV, the fifteenth chapter of the Gospel of Mark in the New Testament of the Christian Bible *

International Watch Company IWC International Watch Co. AG, also known as IWC Schaffhausen, is a Swiss watch manufacturer located in Schaffhausen, Switzerland. Originally founded by American watchmaker Florentine Ariosto Jones in 1868, IWC has been a subsidiary of the Sw ...

Mark XV; pilot watch produced from 1999 to 2006 {{disambiguation