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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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  8. 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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  9. 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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  10. 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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  11. 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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  12. Rainier Arms Exclusive Foxtrot Mike (FM) Products AR-15 5.56MM FM-15 Gen 2 Complete Upper Receiver - 13.9" (Rainier Arms Exclusive)
    Foxtrot Mike (FM) Products AR-15 5.56MM FM-15 Gen 2 Complete Upper Receiver - 13.9" (Rainier Arms Exclusive)
    Special Price $599.99 Regular Price $659.95
    Out of stock
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  13. 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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  1. Thread Pitch 1/2x28 Remove This Item
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Barrel Length
  1. 10.5" 3 items
  2. 11.5" 1 item
  3. 12.5" 2 items
  4. 13.7" 2 items
  5. 13.9" 1 item
  6. 14.5" 2 items
  7. 16" 4 items
  8. 18" 1 item
Caliber
  1. 5.56 NATO 12 items
  2. 5.56mm 1 item
Category
  1. Complete Upper Receivers 3 items
  2. Partial Upper Receivers 10 items
Color
Gas Block Diameter
  1. .750" 9 items
Gas Length
  1. Carbine 5 items
  2. Mid 7 items
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  1. No 13 items
Manufacturer
  1. Angstadt Arms 1 item
  2. Foxtrot Mike 1 item
  3. Noveske 1 item
  4. Rainier Arms, LLC 4 items
  5. Sons of Liberty Gun Works 6 items
Mount
  1. M-LOK 7 items
Price
  1. $0.00 - $999.99 12 items
  2. $1,000.00 and above 1 item
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  1. AR-15 Complete Upper Receiver 2 items
  2. AR-15 Partial Upper Receiver 9 items
  3. AR-15 Handguard 1 item
  4. Complete Upper 1 item
Rail Length
  1. 9.5" 1 item
  2. 9.55" 2 items
  3. 10.7" 1 item
  4. 11.7" 2 items
  5. 13" 1 item
  6. 13.7" 2 items
  7. 15" 5 items
Threaded
  1. Yes 11 items
  2. No 1 item
Twist Rate
  1. 1:7 11 items
  2. 1:8 1 item
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  2. Out of stock 6 items
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