the Beretta M9

The Beretta M9, officially the Pistol, Semiautomatic, 9mm, M9, is a 9×19mm Parabellum pistol adopted by the United States Armed Forces in 1985. It is essentially a military specification Beretta 92F, later known as the 92FS.
The M9 won a competition in the 1980s to replace the M1911A1 as the primary sidearm of the U.S. military, beating many other contenders, and only narrowly defeated the SIG P226 for cost reasons It officially entered service in 1990 Some other models have been adopted to a lesser extent, namely the M11 pistol, and other models remain in use in certain niches.
The M9 was scheduled to be replaced under a United States Army program, the Future Handgun System (FHS), which was merged with the SOF Combat Pistol program to create the Joint Combat Pistol (JCP). The JCP was renamed Combat Pistol (CP), and the number of pistols to be bought was drastically cut back. The joint U.S. Army/Air Force Modular Handgun System could select a commercial off-the-shelf handgun to replace the M9 pistol in Fiscal Year 2013–2014 if budget funds allow the implementation of the study