The SG 550 (Sturmgewehr 90) is the Swiss Army assault rifle, noted for exceptional precision and build quality. Features a folding polymer stock, transparent magazines that can be coupled together, and a 1:10 twist barrel optimized for the SS109 round. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 1990, Switzerland Weight: 9.04 oz Overall length: 39.3" Status: Active Military use: Yes Intended use: Military, Precision