The M1911 GI standard is a great representation of the original US GI combat issue 1911 chambered in 45 ACP and is built in Rock Islands top quality production and engineering standards. Fixed low profile sights and traditional smooth slim design are perfect for quick pull holster use. A durable parkerized finish provides it a tough and smooth non reflective surface. The 5" threaded supressor ready barrel. True to all Rock Island 1911s, the GI Standard comes with a crisp factory 4 to 6 pound trigger which makes this fine pistol a great experience right out of the box.