The SIG 550-1 Sniper, a semi-automatic variant developed for Swiss police, features a heavy 25.6-inch barrel in 5.56x45mm for enhanced velocity. It boasts a highly adjustable stock, specialized trigger, and Hensoldt optics, but its high 1989 price point and 7.62mm competition like the H&K PSG-1 limited its market success, making it a rare collector's item.
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