Description
| Manufacturer | Heckler and Koch (HK USA) |
| Model | MR556 A4 SBR |
| Type | NFA – Short Barrel Rifle |
| Action | Semi-Auto |
| Family | MR556 Series |
| Special Option | Threaded Barrel |
| Caliber/Guage | 223 Rem | 5.56 NATO |
| Finish | Black |
| Frame/Stock/Grips | Collapsible / Folding Stock HK416 Slimline Furniture |
| Barrel | 11″ |
| Overall Length | 26.5″ |
| Capacity | 10 + 1 |
| # of magazines | 1 10 rd. |
| Sights | No Sights |
| Weight | 6.61 lbs. |
| Shipping Weight | 1 |
| AdditionalFeature | Short Stroke Gas Piston |
| AdditionalFeature | HK416 Upper Receiver |
| AdditionalFeature | M-LOK Handguard |
| MFG Model No | 81001049 |
| UPC | 642230274129 |
