Even rarer than the lauded 2nd Gen. G19 are the THREE G19 Glocks made in 9x21. Three special agents of the US Naval Investigative Service were being stationed in Italy with some work being done incognito and since they could not carry 9x19 as it's illegal for civilians in Italy these were made for them. The pistols are marked with the new caliber on the frame and barrel and have serial numbers EN260US, EN261US and EN262US. Source: http://www.glockfaq.com/rare.htm Wanna kill these ads? We can help!