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




