Ruger AR-556 5.56 NATO Semi-Auto Rifle, 16 in Barrel, FDE Finish, 1:8 Twist, Custom Viper Stock & M-LOK Handguard (2016)
This Ruger AR-556 is a 2016 AR-15 platform rifle chambered in 5.56mm NATO with a factory FDE finish and carbine-length gas system. It features notable upgrades including a Strike Industries Viper 6-position adjustable stock and a carbine-length drop-in polymer M-LOK handguard. The receiver is marked Mayodan, NC USA with the AR-556 rollmark, and the upper is a flat-top Picatinny with a forward assist and dust cover.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are visible scratches and blemishes on exterior surfaces from prior handling and use.
What’s Included
- Ruger factory cardboard box
- 1x 30-round Magpul PMAG polymer AR-15 magazine
- Strike Industries Viper adjustable carbine stock (installed)
- Carbine-length M-LOK polymer drop-in handguard (installed)
Chambered in 5.56mm NATO, this AR-556 uses a direct impingement system with a carbine-length gas setup and a 16-inch barrel. The barrel has a 1:8 twist and a threaded muzzle fitted with a flash suppressor, supporting a wide range of 5.56/.223 bullet weights and accessories compatible with the threads.
The rifle’s receiver is finished in tan/FDE and marked Mayodan, NC USA with the AR-556 rollmark. The flat-top Picatinny upper includes a forward assist and dust cover, and bears a keyhole-shaped forging mark on the receiver. It is equipped with an A2-style fixed front sight tower/gas block and a flip-up rear aperture sight on the receiver rail.
Upgrades include a Strike Industries Viper 6-position adjustable carbine stock, offering an approximate length of pull from 11 to 14 inches, and an aftermarket carbine-length two-piece drop-in polymer M-LOK handguard. The rifle retains a black finger-groove pistol grip with Ruger medallion and a manual safety.
Magazine compatibility is STANAG, with a stated capacity of 30+1. One 30-round Magpul PMAG is included, and the rifle ships with a Ruger factory cardboard box. Country of origin is the United States.