The Marines Special Operations Command – MARSOC is going with the 9mm Glock 19 as its secondary weapon. They picked the 9mm over the .45 caliber for a number of reasons to include accuracy and cost. The Glock provides a pistol that can be used for both a concealed carry profile and a low-visibility profile.
While the .45-caliber cartridge has more knock down power, the 9mm has more penetrating power. More rounds can be carried in a magazine for a 9mm weapon than .45-caliber weapon.
Read more in “Marines opt for the 9 mil over 45s for special operators”, Marine Corps Times, September 30, 2016.
