SIG-556

The SIG 556 is a semi-automatic rifle produced by SIGARMS International (now known as SIG Sauer Arms Corporation). It was announced in 2006 as a rifle for civilian and law-enforcement use, and was intended primarily for the US market. The SIG 556 is based on the SIG SG 550 assault rifle still in use by the Swiss army today. In the Swiss Army, it is designated as the ‘Stgw 90’ or ‘Sturmgewehr 90’ (‘SG’ also refers to the word ‘Sturmgewehr’). Unlike the SG 550, the SIG 556 is limited to semi-automatic fire only, thus being legal in most countries that permit civilians to own rifles. SIG Sauer al...