BRZEN
SIG SG 550
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The SIG SG 550 is an assault rifle manufactured by SIG Sauer AG in Switzerland. "SG" is an abbreviation for Sturmgewehr. The SG 550 was co-developed by SIG Sauer AG and the Italian firearm manufacturer Beretta and is based on its predecessor, the SIG SG 540, which is chambered in 5.56×45mm NATO.