The SIG SG 540 is an export-oriented 5.56mm assault rifle predating the SG 550, developed for military customers who could not afford Swiss-manufactured SG 550 series rifles. It was manufactured in France under license by Manurhin and adopted by numerous African, South American, and Middle Eastern militaries. The SG 540 is a simpler design than the SG 550 but retains good reliability. Type: Rifle Action: Semi/Full-Auto Caliber: 5.56x45mm Capacity: 30 Year introduced: 1977, Switzerland Weight: 116.8 oz Overall length: 37.6" Status: Discontinued Military use: Yes Intended use: military