The U.S. military has officially entered a new era of sidearms with the selection of the SIG Sauer P320 as its new Modular Handgun System (MHS). The 10-year, $580 million contract, awarded in 2017, marked the end of the Beretta M9's three-decade reign as the military's primary service pistol. [2, 4, 8, 9, 16] The P320, a polymer-framed, striker-fired pistol, was chosen after a rigorous competition that saw it beat out offerings from other major manufacturers, including Glock, FN, and the incumbent Beretta. [9] A key feature of the P320 is its modularity. The serialized chassis can be easily swapped between different grip modules and slide lengths, allowing the weapon to be configured for a variety of roles, from a full-size duty pistol to a compact concealed carry weapon. [8] The contract calls for SIG Sauer to supply both the full-size M17 and compact M18 versions of the pistol to all branches of the U.S. military. [8] The pistols are chambered in 9mm and can be equipped with suppressors and both standard and extended capacity magazines. [8] The adoption of the P320 reflects a broader trend in the firearms industry towards modular, striker-fired pistols. These designs are often lighter, simpler, and more adaptable than the traditional hammer-fired pistols they replace. The P320's victory in the MHS competition was a major coup for SIG Sauer, solidifying its position as a top-tier supplier of firearms to the U.S. military. The new sidearm has been generally well-received by service members, who have praised its ergonomics, accuracy, and reliability. The transition to the P320 is expected to be completed in the coming years, with hundreds of thousands of the new pistols being delivered to units across the globe. [9]