该枪是西格武器公司针对美国民间市场推出的一款半自动步枪,其是SG553军警用型的民用版本,快慢机仅有单发和保险两个位置。不过,为迎合美国民用市场,民用型在军警用型基础上有所改造。该枪机械瞄具、枪托等仍采用西格风格,但下机匣改为AR系步枪风格的,也可使用AR系标准步枪弹匣。同时,其护手下方增加一段皮卡汀尼导轨,可 The gun is a semi-automatic rifle launched by Sigurdau Corporation for the U.S. civilian market. It is a civilian version of the SG553 for military and police applications. The speed and speed limiter has only one position and two positions for insurance. However, in order to cater to the U.S. civilian market, the civil type has been modified on the basis of military and police use. The gun mechanical sights, butt and so on are still using the grid style, but the lower casing to AR-style rifle style, you can also use AR-standard rifle magazine. At the same time, add a section of Picatinny rail below its guard