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  3. 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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  4. 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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  9. 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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  10. 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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  11. Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 16"
    Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 16"
    $855.00
    Out of stock
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  12. Sons of Liberty Gun Works M4-EXO3 300 BLK AR-15 Upper - 10.5"
    Sons of Liberty Gun Works M4-EXO3 300 BLK AR-15 Upper - 10.5"
    $712.50
    Out of stock
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  13. Sons of Liberty Gun Works M4-EXO3 5.56 AR-15 Upper - 13.7"
    Sons of Liberty Gun Works M4-EXO3 5.56 AR-15 Upper - 13.7"
    $807.50
    Out of stock
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  14. Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 13.7"
    Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 13.7"
    $950.00
    Out of stock
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Barrel Length
  1. 10.5" 6 items
  2. 10.7" 1 item
  3. 11.5" 2 items
  4. 12" 1 item
  5. 12.5" 3 items
  6. 13.7" 3 items
  7. 14.5" 1 item
  8. 16" 5 items
Barrel Profile
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Caliber
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  2. 5.56 NATO 12 items
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Gas Block Diameter
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Price
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  6. $900.00 and above 1 item
Rail Length
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  2. 9.5" 2 items
  3. 9.55" 3 items
  4. 10.7" 2 items
  5. 11" 1 item
  6. 11.7" 2 items
  7. 13" 1 item
  8. 13.7" 1 item
  9. 15" 4 items
Thread Pitch
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  2. 5/8x24 1 item
Twist Rate
  1. 1:7 10 items
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