Description
| Manufacturer | Heckler and Koch (HK USA) |
| Model | MR556A4 URK |
| Type | Accessory-Uppers |
| Family | MR556 Series |
| Finish | Matte Black |
| Barrel | 16.5″ |
| Shipping Weight | 11.3 |
| AdditionalFeature | Includes Bolt and Buffer |
| AdditionalFeature | M-Lok Handguard |
| MFG Model No | 51000384 |
| UPC | 642230270213 |
