Mark 23

Mark 23 or Mk.XXIII or variation, may refer to:

U.S. Navy
The U.S. Navy designation Mark 23 may refer to:


 * Heckler & Koch Mark 23, a .45 ACP-caliber handgun
 * Mark 23 machine gun, a configuration of the Stoner 63 weapons system used by US Navy SEALs.
 * Mark 23 Pistol and Suppressor Kit, a Vietnam War-era kit issued to US Navy SEALs, containing a Mark 22 pistol and a Mark 3 noise suppressor.
 * Mark 23 torpedo, a submarine-launched anti-ship torpedo used in World War II

UK Royal Navy

 * Mark 23 Grog, a British wire-guided 21-inch torpedo
 * BL 6-inch Mk XXIII naval gun, a British WWII naval artillery gun
 * QF 4-inch naval gun Mk XXIII, a British Cold-War submarine deck gun

Other uses

 * Bolo Mk XXIII, a fictional super-tank