STI has Duty One 5.0, 4.0 and 3.0. Each numbers represent length of barrel. This 9mm 1911 has been quite a shooter and Tactical Dalai Lama Ken Hackathorn seems to be extremely satisfied with his. For 2014, aluminum frame is also available. MSRP $1385
The model also comes in .40 S&W and .45 ACP too