Ruger AR-556 5.56 NATO Semi-Auto Rifle, 16 in Threaded Barrel, Model 8500, Custom Lantac M-SPEC BCG, A2 Fixed Stock (2016)
This Ruger AR-556 is a Model 8500 configuration in 5.56 NATO with a 16 in threaded barrel and factory A2 birdcage. Notable upgrades include a Lantac M-SPEC bolt carrier group and a fixed A2-style rifle buttstock. Built on a flat-top upper with a MIL-STD-1913 rail and A2 front sight base with Ruger Rapid Deploy flip-up rear sight, it was manufactured in 2016 at Ruger’s Mayodan, North Carolina facility. It includes the Ruger factory box, owner’s manual, and one 30-round Magpul PMAG.
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: This rifle shows markings from prior handling and use. Please refer to the photos for details.
What’s Included
- Ruger factory cardboard box (Model 08500 label visible)
- Ruger AR-556 owner’s manual
- 1x 30-round Magpul PMAG polymer AR-15 magazine
The rifle follows Ruger’s Model 8500 configuration: a flat-top upper receiver with a MIL-STD-1913 rail, forward assist, ejection-port cover, and shell deflector. It uses a carbine-length gas system with a two-piece polymer handguard retained by a delta ring and marked with the Ruger medallion. The 16 in barrel is threaded and fitted with an A2 birdcage flash suppressor.
Key customizations include a Lantac M-SPEC bolt carrier group and a non-factory fixed A2-style rifle buttstock. The A2-style polymer pistol grip complements the fixed stock, and the length of pull measures 13.75 in.
Sighting is straightforward with an A2 front sight base and a Ruger Rapid Deploy flip-up rear sight. The flat-top rail provides standard mounting real estate while keeping the sight line consistent with the A2 front post.
The receivers are aluminum with a black anodized finish, and steel components are finished in black oxide per the factory label. Chambered in 5.56 NATO, it accepts AR-15 pattern magazines and is rated for a 30+1 capacity. This example was produced in 2016 at Ruger’s Mayodan, North Carolina facility.