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Ruger SR-556 vs SIG SG 553
Side-by-side technical comparison
Ruger SR-556
RiflesDiscontinued
SIG SG 553
RiflesIn production
Overview
Spec
Ruger SR-556
SIG SG 553
Production
2009–2016
1990–present
Units produced
Limited
Unknown
Specifications
Spec
Ruger SR-556
SIG SG 553
Overall length
890 mm
733 mm
Barrel length
406 mm
246 mm
Weight
3.9 kg
3.1 kg
Magazine capacity
30 rounds
20 rounds
Action type
short-stroke gas piston
Short-stroke gas piston
Trigger type
single-stage
Single stage
Sights
Folding sights, optics-ready
Adjustable diopter rear with front post
Calibers
Ruger SR-556
SIG SG 553