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  4. 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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  5. Noveske N4 Recon Gen 4 5.56 NATO Complete Upper - 16" Black
    Noveske N4 Recon Gen 4 5.56 NATO Complete Upper - 16" Black
    $1,496.25
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  1. Gas Block Diameter .750" Remove This Item
  2. Thread Pitch 1/2x28 (.22 cal) Remove This Item
  3. Caliber 5.56 NATO Remove This Item
  4. Gas System Length Mid Remove This Item
  5. Rail Length 15" Remove This Item
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