Ruger SR-556 5.56mm NATO AR-15 Piston Rifle, 16 in Hammer-Forged Chrome-Lined Heavy Barrel, Troy BattleSights & Quad Rail (2015)
The Ruger SR-556 is a short-stroke gas piston AR-15 built with durable materials and proven components. This 2015 example pairs a cold hammer-forged, chrome-lined heavy barrel with a four-position adjustable gas regulator, a pinned Troy free-float quad rail, and Troy folding BattleSights. It includes three magazines and features Ruger’s chrome-plated bolt carrier group, hard-coat anodized aluminum receivers, and Newport, NH markings.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Details: This firearm is in great shape. There are some minor and superficial scratches and blemishes present. The bore is clean and shiny.
What’s Included
- Ruger SR-556 rifle
- 1x 32-round magazine
- 2x 30-round magazines
- Magpul PMAG GEN M3 and Daniel Defense polymer magazines
This SR-556 uses a semi-automatic, short-stroke gas piston system with a four-position adjustable gas regulator, including a gas-off setting. The bolt and bolt carrier are chrome-plated, and the upper is a flat-top A3 with forward assist and dust cover.
The 16-inch heavy-contour barrel is made from 41V45 steel, is cold hammer-forged and chrome-lined, and uses a 1:9 right-hand twist. It is threaded 1/2-28 and fitted with a birdcage flash suppressor.
Furniture and controls are practical and durable: a six-position collapsible polymer stock and a finger-grooved polymer pistol grip with Ruger medallion. The rifle wears Troy folding BattleSights front and rear for reliable iron sights.
The handguard is a pinned, one-piece 10-inch Troy Industries free-float quad rail with a full-length top rail. Receivers are aluminum with a hard-coat anodized black finish. Markings include lower marked "SR-556" and receiver marked "RUGER NEWPORT NH USA."
This rifle is an AR-15 platform chambered in 5.56mm NATO with a 32+1 capacity. The serial prefix 590- corresponds to 2015 production and aligns with the provided year of manufacture.