The form is handsome and quite satisfying firepower makes SIG 552 assault rifle much in the interest of several countries in the world. SIG 552 provides a high accuracy of these weapons began to actively use the Swiss army in 1978.
Cartridge
5.6mm Gw Pat 90 (5.56x45mm NATO)
Action
Gas operated, rotating bolt
Rate of fire
Approx. 700 rounds/min
SG 550: 911 m/s (2,989 ft/s)
SG 551: 850 m/s (2,788.7 ft/s)
SG 552 Commando: 725 m/s (2,378.6 ft/s)
SG 550 Sniper: 940 m/s (3,084.0 ft/s)
Effective range
100–400 m sight adjustments
Feed system
5, 20, 30-round detachable box magazine
Sights
Rear: rotating diopter drum with tritium night inserts;
front: hooded post with folding night post
540 mm (21.3 in) sight radius (SG 550)
466 mm (18.3 in) sight radius (SG 551)
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