SIG SG 550
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The SG 550 is an assault rifle manufactured by SIG Sauer AG in Switzerland. "SG" is an abbreviation for Sturmgewehr. The rifle is based on the earlier 5.56×45mm NATO SIG SG 540. Wikipedia
Manufacturer: SIG Sauer AG (formerly Schweizerische Industrie Gesellschaft and Swiss Arms)
Effective range: 100–400 m
Action: Gas operated, rotating bolt
Designed: 1970s–1980s
In service: 1990–present
Length: 1,000 mm (39.4 in) (stock extended); 772 mm (30.4 in) (stock folded)