The Ruger AR-556 is chambered in 5.56 NATO with M4 feed ramps provide improved operational reliability. The cold hammer-forged barrel has ultra-precise rifling for exceptional accuracy, longevity, and easy cleaning. Its upper receiver is forged from 7075-T6 aluminum and includes a forward assist, dust cover, and brass deflector. It has a Bravo B5 style black synthetic buttstock and Mil-Spec buffer tube.
| FireArm | yes |
| Caliber | 5.56x45mm |
| Sights | Picatinny Rail |
| Metal Finish | Black Hardcoat Anodized |
| Action | Semi-Auto |
| Stock Description | B5 Bravo |
| Weight Range | 6 lbs to 6.99 lbs |
| Weight | 6.70 lbs |
| Barrel Description | Steel |
| Hand | Right Hand |
| Stock Finish Group | Black |
| Metal Finish Group | Blued/Black |
| Receiver Material | Aluminum |
| Barrel Length Range | 16" to 16.99" |
| Barrel Length | 16.10" |
| Capacity | 30+1 |
| Trigger | Two-Stage |
| OAL | 33"- 36.25" |
| Twist | 1:8" |
