Feb 23, 2020 #ten Be sure to Never SHOOT NATO SPEC 9X19 in these outdated pistols. The NATO stuff was built mainly to drive an ornery submachine gun such as the STEN and then the Sterling, both of those of which rely on a hefty impulse to function their Innovative primer ignition blowback models.The SIG Sauer P320 is actually a striker-fired, doubl