It was the result of a merger of two earlier programs, the army's Future Handgun System (FHS) and the Special Operations Forces Combat Pistol.
This effectively reverted to the SOF Combat Pistol program in terms of its scale, as the army dropped its participation.
[1] In a 2007 supplemental session, the congressional defense sub-committee appropriated $5 million to a Joint Combat Pistol study.
The previous adoption took over a decade, involved several acts of Congress and multiple lawsuits, and stirred up great controversy.
This was based on original solicitation, which was later modified, and finally, heavily changed in March 2006, with the program renamed to Combat Pistol.