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  1. 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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  2. 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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  8. Sharps Bros AR-15/M4 .223 Wylde Complete Upper Receiver - 16"
    Sharps Bros AR-15/M4 .223 Wylde Complete Upper Receiver - 16"
    $799.95
    Out of stock
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  9. 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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  10. Aero Precision M4E1 300BLK Complete Upper Receiver w/Atlas R-ONE Handguard - 8" Black
    Aero Precision M4E1 300BLK Complete Upper Receiver w/Atlas R-ONE Handguard - 8" Black
    $534.99
    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. Angstadt Arms AR-15 5.56 Complete Upper Assembly - 16"
    Angstadt Arms AR-15 5.56 Complete Upper Assembly - 16"
    $404.00
    Out of stock
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  15. 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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  16. Noveske AR-15 N4 5.56 NATO SPR Upper - 18"
    Noveske AR-15 N4 5.56 NATO SPR Upper - 18"
    $1,543.75
    Out of stock
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