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Mfg Item #: 81000579
| Brand | HK |
| Caliber | 5.56x45mm NATO |
| Model | MR556 |
| Series | A1 |
| Action | Semi-Auto |
| Barrel Length Range | 16" to 16.99" |
| Sights | None, Optic Ready |
| Capacity | 30+1 |
| Magazine Type | OEM |
| Handguards | M-LOK |
| OAL | 33.90"-37.68" |
| Receiver Finish | Black |
| Receiver Material | Aluminum |
| Stock Description | Adjustable |
| Stock Finish Group | Black |
| Stock Material | Synthetic |
| Twist | 1:7" |
| Weight | 8.60 lbs |
| Barrel Description | Medium Contour |
| Barrel Length | 16.50" |