Initially, SOG’s primary weapon was the 9 mm Luger Karl Gustav Model 1945 submachine gun, nicknamed the “Swedish K.” Obtained through the Central Intelligence Agency, these untraceable guns ...

MACV-SOG - the Vietnam War's covert operations unit-inserted small teams deep behind enemy lines in Laos and Cambodia along the heavily defended Ho Chi Minh Trail highway system. At times ...

The guns.com article suggests that the USMS SOG was working relatively closely with STI before the order, so in a sense, the USMS’s STI 2011 is practically a custom gun made to their request.