SIG SG 551

SIG SG 551

Type	Assault rifle
Place of origin	Switzerland
Service history
In service	1990–present
Used by	See Users
Production history
Designer	SIG
Designed	1970s
Manufacturer	Swiss Arms AG (formerly SIG)
Produced	1986–present
Number built	600,000+
Variants	See Variants
Specifications
Weight	SG 551: 3.40 kg (7.5 lb)
Length	SG 551 (stock extended): 833 mm (32.8 in) SG 551 (stock folded): 607 mm (23.9 in)
Barrel length	SG 551: 363 mm (14.3 in)
Cartridge	5.6mm Gw Pat 90 (5.56x45mm NATO)
Action	Gas operated, rotating bolt
Rate of fire	Approx. 700 rounds/min
Muzzle velocity	SG 551: 850 m/s (2,788.7 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 466 mm (18.3 in) sight radius (SG 551)