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Heckler & Koch MR556 vs SIG MCX
Heckler & Koch MR556
vs
SIG MCX
Side-by-side technical comparison
Heckler & Koch MR556
Rifles
In production
SIG MCX
Rifles
In production
Overview
Spec
Heckler & Koch MR556
SIG MCX
Manufacturer
Heckler & Koch
SIG Sauer
Country
Germany
United States
Production
2007–present
2015–present
Units produced
Unknown
Unknown
Specifications
Spec
Heckler & Koch MR556
SIG MCX
Overall length
920 mm
635–900 mm
Barrel length
406 mm
191–406 mm
Weight
4.2 kg
2.9–3.6 kg
Magazine capacity
30 rounds
30 rounds
Action type
short-stroke gas piston
short-stroke gas piston
Trigger type
single-stage
two-stage
Sights
Flip-up or optics-ready
Flip-up sights, optics rail
Calibers
Heckler & Koch MR556
.223 Remington / 5.56x45mm NATO
5.56x45mm NATO
SIG MCX
300 Blackout
5.56x45mm NATO
7.62x39mm Soviet
Heckler & Koch MR556
SIG MCX
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