Additional information
| UPC | 785939519167 |
|---|---|
| Manufacturer | Sons of Liberty Gun Works |
| Manufacturer Part Number | M489UPPER-13.7-556 |
| Product Type | Upper |
| Subcategory | Complete Upper Receivers |
| Model | M4 |
| Finish | QPQ |
| Description | MLOK |
| Color | Black |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Barrel Length | 13.7" Pinned (16" OAL) |
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