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Heckler & Koch, MFG# 51000384, UPC: 642230270213, UOM: EA, Complete Upper Receiver/Barrel Assembly Kit, MR556 A4, 16.5″, Black, HKUS, HKUSPT60, HKUSPTALL, PT60, PTALL
| UPC | 642230270213 |
|---|---|
| Manufacturer | Heckler & Koch / H&K |
| Manufacturer Part Number | 51000384 |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Barrel Length | 16.5 |
| Barrel Finish | STAINLESS |
| Product Type | Upper |
| Model | MR556 A4 Upper Receiver |
| Shipping Weight | 0.0 |
| Rate of Twist | 1-in-7" |
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