Swiss Armed Forces standard assault rifle adopted as the Sturmgewehr 90, the SG 550 in Swiss service chambered for 5.56mm NATO. Type: Rifle Action: Semi-Automatic/Automatic Caliber: 5.56x45mm NATO Capacity: 20 Year introduced: 1990, Switzerland Weight: 141.1 oz Overall length: 39" Status: Active Military use: Yes Intended use: military