Ruger AR-556 5.56 NATO Semi-Automatic Rifle | 16.1" Cold Hammer-Forged Barrel | Six-Position Stock
Ruger’s AR-556 is a factory-built, direct-impingement AR-15 that combines Ruger reliability with a host of practical features. Built in 2017, this full-size carbine offers a 16.1-inch cold hammer-forged 4140 chrome-moly steel barrel, forged 7075-T6 aluminum receivers, and Ruger’s Rapid Deploy flip-up rear sight. Threaded 1/2"-28 at the muzzle and equipped with a six-position collapsible stock, it delivers a ready-to-run platform for range, training, or duty use.
Condition
Overall Condition: Good – Shows signs of prior use and handling.
Bore Condition: Good – Clean and shiny with minor wear marks.
Bore Rifling: Good – Intact, well-defined lands and grooves.
Specific Condition Notes: Exterior surfaces display minor, superficial scratches and blemishes. The bolt has a slight stick when cycled by hand but returns to battery.
What’s Included
- Magpul PMAG 30 GEN M3 polymer magazine (30-round)
- Ruger AR-556 instruction manual
The heart of this rifle is its 16.1-inch, cold hammer-forged barrel made from 4140 chrome-moly steel. The process produces a strong, wear-resistant bore and consistent 1:8" right-hand twist that stabilizes a broad range of 5.56 NATO and .223 Remington bullet weights.
A carbine-length gas system feeds a chrome-plated carrier interior with a staked gas key for durability. The serrated gas block features an A2 F-height sight post, bayonet lug, and QD sling swivel socket, giving the shooter classic functionality with modern convenience.
The 7075-T6 forged upper receiver sports an integral Picatinny rail, forward assist, brass deflector, and dust cover. Paired with a forged lower and a six-position collapsible synthetic stock, the rifle offers a balance of strength, weight savings, and user adaptability.
Ruger’s Rapid Deploy flip-up rear sight complements the integral front sight, while the two-piece ribbed glass-filled nylon handguard keeps the barrel free-floating over its full length. The threaded muzzle (1/2"-28) is ready for flash hiders, compensators, or suppressor mounts.
With a factory MSRP of $1,019, this AR-556 delivers a feature-rich, American-made package that is fully compatible with standard AR-15 accessories and upgrade paths.