Ruger AR-556 Standard 5.56mm NATO Semi-Auto Rifle, 16.1 in Cold Hammer-Forged Barrel, 1/8 Twist, Threaded 1/2x28, 2020 Mayodan Production
This Ruger AR-556 Standard is a 2020-production AR-15 platform rifle built at Ruger’s Mayodan, North Carolina facility. It features a 16.10 in cold hammer-forged 4140 chrome-moly steel barrel with a 1:8 RH twist and 1/2x28 threads, an A2 flash suppressor, and a carbine-length gas system with an F-height fixed front sight base. Forged 7075-T6 receivers with Type III hard-coat anodizing, Ruger’s Rapid Deploy rear sight, and four included 30-round magazines round out a well-equipped, factory-correct setup.
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 Notes: There are some minor scratches and blemishes present. The bore presents a bright appearance.
What’s Included
- Ruger AR-556 Standard 5.56mm NATO semi-automatic rifle
- 4x 30-round magazines (Magpul PMAG polymer and USGI-type aluminum, as shown)
The 16.10 in cold hammer-forged barrel is made from 4140 chrome-moly steel and finished in black oxide. Its 1:8 RH twist stabilizes a broad range of bullet weights, and the 1/2x28 muzzle threads come fitted with a factory A2 flash suppressor. The carbine-length gas system uses a pinned, F-height front sight base for durable alignment and reliable operation.
The receiver set is forged 7075-T6 aluminum with a Type III hard-coat anodized finish. The upper features a flat-top Picatinny rail, forward assist, ejection port cover, and brass deflector. Markings include the Ruger phoenix logo and "RUGER MAYODAN, NC USA." The front sight base shows forging code "H."
Sights are a classic A2-style fixed front (elevation-adjustable) paired with a Ruger Rapid Deploy flip-up rear (windage-adjustable). The handguard is a two-piece, ribbed, carbine-length unit made from glass-filled nylon. Controls include a manual safety, and the upper’s rail provides a straightforward mounting surface if you choose to add optics or accessories later.
Internals are built for longevity, with a bolt carrier group using a 9310 steel bolt and an 8620 carrier. The carrier’s internal diameters are chrome plated, and the gas key is properly staked. Overall length is approximately 32.25 to 35.50 in with the six-position collapsible stock, and weight is about 6.5 lb. Standard capacity is 30+1 in 5.56mm NATO.