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  2. Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver - 10.5"
    Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver - 10.5"
    As low as $550.00
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  3. Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver - 12.5"
    Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver - 12.5"
    As low as $600.00
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  11. Maxim Defense MDX 510 5.56 NATO Mil-Spec Complete Upper - 10.3"
    Maxim Defense MDX 510 5.56 NATO Mil-Spec Complete Upper - 10.3"
    As low as $1,255.50
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  13. Sons of Liberty Gun Works M4-76 5.56 AR-15 Partial Upper Receiver - 16"
    Sons of Liberty Gun Works M4-76 5.56 AR-15 Partial Upper Receiver - 16"
    $855.00
    Out of stock
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  14. Blackout Defense Quantum Mark 2 .223 Wylde Complete Upper Receiver
    Blackout Defense Quantum Mark 2 .223 Wylde Complete Upper Receiver
    Out of stock
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  15. Rainier Arms RUC PRO Mk1 Riflespeed Partial Upper Receiver - 11.5"
    Rainier Arms RUC PRO Mk1 Riflespeed Partial Upper Receiver - 11.5"
    $750.00
    Out of stock
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  16. Rainier Arms RUC PRO Mk1 5.56 NATO Riflespeed Partial Upper Receiver - 12"
    Rainier Arms RUC PRO Mk1 5.56 NATO Riflespeed Partial Upper Receiver - 12"
    $750.00
    Out of stock
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Barrel Length
  1. 8.3" 2 items
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  3. 10.5" 6 items
  4. 11.5" 2 items
  5. 11.85" 1 item
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  7. 12.5" 3 items
  8. 13.7" 3 items
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  1. $0.00 - $999.99 21 items
  2. $1,000.00 and above 4 items
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