The military grunts loved the 1911. They need to go back to a 45. caliber 1911. They said they were using the Beretta for 30 years but I remember many of my friends in the military using the 1911 until the late 90s.
After about 30 years of using the Beretta as the primary sidearm pistol for the U.S. military, the Pentagon is seeking a new gun contract.
For gun manufacturers, this kind of a contract is a once-in-a-lifetime opportunity.
While the Beretta lasted three decades, the U.S. military's first semiautomatic standard-issue sidearm, the M1911 from Colt, lasted nearly 90 years. It was issued during the U.S. war in the Philippines through the World Wars to Vietnam and beyond.
http://money.cnn.com/2014/12/03/news/companies/army-gun-new-beretta/index.html