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SIG SG 550 (Sturmgewehr 90)
IN PRODUCTION
Quick Overview
Manufacturer
Origin
Production
1990 - Present
Overview
The SIG SG 550 is a battle rifle designed and manufactured by Swiss Arms AG (formerly SIG Arms). It has served as the standard service rifle of the Swiss Armed Forces since 1990, designated as the Sturmgewehr 90.
Calibers & Ammunition
Dimensions
Overall Length
998mm (39.3 in) stock extended — 772mm (30.4 in) folded
Barrel Length
528mm (20.8 in)
Weight
4,100g (9.0 lb) empty
Mechanical
Action Type
Gas-operated, long-stroke piston
Trigger Type
Single-stage (mil-spec); optionally two-stage match
Sights Type
Drum aperture rear, protected front post; Picatinny rail for optics
Magazine Capacity
20 or 30 rounds (STANAG-compatible after modification)
Additional Information
stock
Folding synthetic stock; integrated bipod in handguard
action
Gas-operated, long-stroke piston, rotating bolt
barrel
528mm (20.8 in) — hammer-forged, cold-formed, chrome-lined
accuracy
1-1.5 MOA with standard ammunition — exceptional for a service rifle
variants
SG 550 (full-length), SG 551 (carbine), SG 553 (compact), civilian SG 55x series
rate_of_fire
700 rounds/min (full-auto variants)
How does the SIG SG 550 (Sturmgewehr 90) compare?
Pick any other firearm for a side-by-side spec breakdown.