Sig P320/M17 Modular Handgun System
In 2017, Sig Sauer beat Glock, Beretta, and other competitors for the U.S. Army’s M17 Modular Handgun System (MHS). The M17 is based on the Sig Sauer P320 and appears similar on its surface to other Sig pistols—but has several new internal updates from previous designs. The MHS consists of the full-sized M17 pistol and the compact M18, both of which are chambered for 9mm and distributed with seventeen- and twenty-one-round magazines.
Unlike previous Sig handguns, the P320 is a striker fired pistol that does away with a hammer and firing pin. The P320 also has a manual safety, a key Army requirement. The pistol is double action only, meaning a single trigger pull will both cock the pistol and release the firing pin, firing the gun. The P320 for civilians is available in 9mm, .357 SIG, .40 Smith & Wesson and .45 ACP.
Kyle Mizokami is a defense and national-security writer based in San Francisco who has appeared in the Diplomat, Foreign Policy, War is Boring and the Daily Beast. In 2009, he cofounded the defense and security blog Japan Security Watch. You can follow him on Twitter: @KyleMizokami. This article first appeared several years ago.