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Rock River Arms A4 Carbine upper comes chambered in .350 Legend with a 16″ chrome moly 1/16 twist barrel. Additionally this upper includes a RRA 13″ M-Lok compatible lightweight free float rail and a RRA Operator Brake (1/2-36 thread). This is a complete upper with bolt carrier group, charging handle assembly and a 10 round magazine.
| UPC | 842834124589 |
|---|---|
| Manufacturer | Rock River Arms |
| Manufacturer Part Number | 350L0328 |
| Barrel Length | 16" |
| Product Type | Upper |
| Caliber/Gauge | .350 Legend |
| Model | Tactical Carbine |
| Capacity | 10 |
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