As more and more federal agencies adopt various variations on the Glock pistol, the recent adoption of the STI 2011 by the U.S. Marshals Service Special Operations Group (USMS SOG) stands out. The STI 2011 is a double-stack 9mm variant of the venerable 1911 pistol—a design that is over 100 years old at this point.
But why did the SOG choose the 2011 instead of another Glock? 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. The pistol is also replacing Springfield Armory 1911s. As the 2011 has practically the same manual of arms and excellent trigger pull as the 1911, adopting a 2011 would make the transition to the new gun easier than a transition to a striker-fired or DA/SA trigger.