SIG SG 552
The SG 550 is an assault rifle manufactured by Swiss Arms AG (formerly a division of Schweizerische Industrie Gesellschaft, now known as SIG Holding AG) in Switzerland. "SG" is an abbreviation for ''Sturmgewehr'' ("assault rifle"). The rifle is based on the earlier 5.56×45mm NATO SIG SG 540. History Development In 1978, the Swiss armed forces formulated requirements for a successor to the SIG SG 510, Stgw 57 battle rifle (known commercially as the SG 510) using the 7.5×55mm Swiss, 7.5×55mm GP 11 Cartridge (firearms), cartridge. Emphasis was placed on Modular Weapon System, modularity; the weapon family was to include several variants of the base design, including a compact carbine that would be issued to rear-echelon and support troops, command staff, vehicle crews, special forces personnel and paratroopers. Another aim was to reduce the overall weight of the rifle while retaining comparable or improved accuracy out to 300 m. The solicitation was narrowed down to two design ...
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