Milled gas block is located at a carbine length (M4) position. Multiple attachment points include a QD socket and bayonet lug. Serrations on the angled face of the gas block provide a low glare surface. The handguards are made from heat-resistant glass-filled nylon. Front sight post is elevation adjustable, and a front sight tool is included. A-2 Style F-Height allows co-witness with many optics. Ruger Rapid Deploy folding rear sight provides windage adjustability. Elevation adjustable front sight. Rear sight can be folded out of the way to make room for optics but can be instantly redeployed if needed. Six-position telescoping M4-style buttstock and Mil-Spec buffer tube. Medium contour barrel is cold hammer-forged. 1:8 inch right hand twist rate stabilizes bullets from 35 to 77 grains and the 5.56 NATO chamber allows the use of both 5.56 NATO and .223 Remington ammunition. M4 feed ramps. Matte black oxide finish provides corrosion resistance. Ruger flash suppressor. 1/2-28 inch threaded barrel. Ergonomic pistol grip features an extended trigger reach. Enlarged trigger guard. Chrome-plated bolt carrier. Chrome-plated gas key. Gas key is staked so that it will not loosen after extensive firing. Matte black oxide finish. Includes one 30-round Magpul PMAG magazine.
| Attribute | Value |
| Long Gun Web Model | AR-556 |
| Barrel Length | 16.1 |
| Made In The USA | Made In The USA |
| Caliber | 5.56mm NATO |
| Capacity | 30 |
| Finish | Black |
| Threaded Barrels | Threaded Barrel |
| Caliber-Gauge | .223 REM. |
| Manufacturer Part Number | 08500 |