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Quick Look

The SIG 556 R was developed by SIG Sauer as a modernized, AK-compatible variant of its 556 platform. Designed for enhanced reliability and chambered in 7.62x39mm, it offers AK-like ballistics with AR-style ergonomics. It maintains a niche presence among shooters who want AK power with Western handling and modularity.

Why It's a Top Choice

Compatible with standard AK magazines
Advanced gas-piston operating system
Factory folding and collapsible stock
Monolithic Picatinny rail for optics and accessories
Balanced AK performance and AR modularity

Key Variants

SIG 556R Gen 2

Improved reliability and receiver updates tailored to fix early model issues.

Competitor Comparison Table

Feature	Sig 556 R	Zastava ZPAP M70	Arsenal SAM7R
MSRP	$1,300	$1,000	$1,500
Capacity/Size	30+1, 16" barrel	30+1, 16.3" barrel	30+1, 16.3" barrel
Weight	7.1 lbs	7.9 lbs	8.2 lbs
Optics-Ready	Yes	No (side rail only)	No (side rail only)
Trigger Type	AR-style, two-stage	Traditional AK	Mil-spec AK
Notable Pro	Modular stock and rail system	Chrome-lined barrel	Milled receiver durability
Notable Con	Early models had feeding issues	Limited furniture options	Heavier than competitors

Best Use Cases

Homeland defense and preparedness
Training with AK ammo compatibility
Collecting rare tactical rifles
Range recreation with optics-ready features

FAQs

Can I use standard AK magazines with the SIG 556 R?

Yes, the SIG 556 R is designed to accept most surplus and commercial AK-47 magazines.

What is the barrel length of the SIG 556 R?

The rifle typically ships with a 16-inch cold-hammer-forged barrel chambered in 7.62x39mm.

How does the SIG 556 R compare to a traditional AK?

The SIG 556 R offers enhanced ergonomics, a Picatinny rail, and improved trigger over standard AKs.

SIG 556 R for Sale