Key Points - The Beretta M9 served as the US military's standard sidearm for decades, seeing action from Desert Storm through the Global War on Terror, eliciting both strong support and criticism.

The M9 is a lightweight, semi-automatic pistol manufactured by Beretta and designed to replace the M1911A1 .45 caliber pistol and .38 caliber revolvers. The Beretta M9 has redundant automatic ...