RUGER SR-556 for Sale
Browse RUGER SR-556 listings from verified sellers across the U.S. on GunsAmerica.
Quick Look
The Ruger SR-556 was introduced in 2009 as Ruger's first AR-platform rifle. Designed with an emphasis on rugged reliability, it features a chrome-plated two-stage piston and cold hammer-forged barrel. Though no longer in production, it remains popular among enthusiasts seeking a factory-built, piston-driven alternative to direct impingement AR-15s.
Why It's a Top Choice
- Short-stroke gas piston reduces fouling and heat buildup
- Chrome-lined barrel offers better corrosion resistance
- Includes flip-up iron sights and quad-rail handguard
- Designed with 100% mil-spec compatibility
- Known for smooth recoil and consistent performance
Key Variants
Ruger SR-556 Standard
The original model with chrome-plated two-stage piston and quad-rail handguard.
Ruger SR-556C
Compact barrel version ideal for tactical maneuvering or home defense use.
Ruger SR-556E
Economy variant with a lighter handguard and fewer accessories included.
Ruger SR-556 Takedown
Modular version with quick takedown feature, great for travel and compact storage.
Ruger SR-762
Chambered in .308/7.62 NATO, ideal for users seeking more stopping power and range.
Competitor Comparison Table
| Feature | Ruger SR-556 | Sig Sauer 516 | LWRC IC SPR |
|---|---|---|---|
| MSRP | $1,599 (discontinued) | $1,799 | $2,499 |
| Capacity | 30+1 | 30+1 | 30+1 |
| Weight | 7.9 lbs | 7.3 lbs | 7.0 lbs |
| Optics-Ready | Yes | Yes | Yes |
| Trigger Type | Single-stage | Mil-spec | Enhanced |
| Notable Pro | Piston system reduces heat and fouling | Trusted by law enforcement | Lightweight and premium build |
| Notable Con | Heavier than direct impingement ARs | Limited variants | Higher price point |
Best Use Cases
- Home defense with piston-driven reliability
- Duty rifle or patrol use
- Medium-range 3-Gun or tactical competition
- Training and range practice
- Collector's item for Ruger completists
FAQs
What is the operating system of the Ruger SR-556?
It uses a chrome-plated, two-stage short-stroke gas piston system with a four-position regulator.
Can I use standard AR-15 parts on the Ruger SR-556?
Yes, it offers near-complete parts compatibility with mil-spec AR-15 components and accessories.
How does the Ruger SR-556 compare to direct impingement ARs?
The piston system reduces carbon fouling and heat transfer, improving reliability in extended use.
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Ruger SR-556 Magazine 90348
$34.99
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