The M2023 was a handgun used by the United States Navy alongside the N99 10mm handgun. Based upon the venerable and reliable M1911A1 used up to 1994, it fires .45 AP (Automatic pistol) from a 14-round staggered magazine as opposed to the 7-round single-stack magazine. It was primarily used by the U.S.N. military police, while the N99 was used by the sailors who were out at sea.