| UPC | 642230270213 |
|---|---|
| Manufacturer | Heckler & Koch / H&K |
| Manufacturer Part Number | 51000384 |
| Action | .223 REM/5.56 NATO |
| Barrel Length | 16.5" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Model | MR556 A4 Upper Receiver |
| Package Height | 3.5 |
| Package Width | 13.5 |
| Product Type | Accessory-Uppers |
| Rate of Twist | 1-in-7" |
| Shipping Weight | 11.3 |
| Barrel Finish | STAINLESS |
| Length | 43.9500 |
