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  1. Rainier Arms Exclusive Rainier Arms / Rellim Arms AR-15 300BLK Take Down Upper Receiver Assembly - 8"
    Rainier Arms / Rellim Arms AR-15 300BLK Take Down Upper Receiver Assembly - 8"
    $1,299.99
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  2. Primary Weapons Systems .223 Wylde MK1 MOD 2-M Complete Upper - 14.5" NO COMPENSATOR
    Primary Weapons Systems .223 Wylde MK1 MOD 2-M Complete Upper - 14.5" NO COMPENSATOR
    $1,299.95
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  3. Primary Weapons Systems .223 Wylde MK1 MOD 2-M Complete Upper - 14.5" (Pinned)
    Primary Weapons Systems .223 Wylde MK1 MOD 2-M Complete Upper - 14.5" (Pinned)
    $1,299.95
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  4. Maxim Defense MDX 505 PDX 300BLK Mil-Spec Complete Upper - 5.5" Urban Grey
    Maxim Defense MDX 505 PDX 300BLK Mil-Spec Complete Upper - 5.5" Urban Grey
    $1,165.50
    Out of stock
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  5. Rise Armament RISE .22 ARC AR-15 Complete Upper Receiver - 18" Black
    Rise Armament RISE .22 ARC AR-15 Complete Upper Receiver - 18" Black
    $999.00
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  6. Maxim Defense MDX 505 PDX 7.62x39 Mil-Spec Complete Upper - 5.5" Urban Grey
    Maxim Defense MDX 505 PDX 7.62x39 Mil-Spec Complete Upper - 5.5" Urban Grey
    $1,165.50
    Out of stock
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  7. Rainier Arms Exclusive Rainier Arms / Rellim Arms AR-15 .223 Wylde Take Down Upper Receiver Assembly - 8.5"
    Rainier Arms / Rellim Arms AR-15 .223 Wylde Take Down Upper Receiver Assembly - 8.5"
    $1,299.99
    Out of stock
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  8. Rainier Arms Exclusive Rainier Arms / Rellim Arms AR-15 5.56 NATO Take Down Upper Receiver Assembly - 16"
    Rainier Arms / Rellim Arms AR-15 5.56 NATO Take Down Upper Receiver Assembly - 16"
    $1,299.99
    Out of stock
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  9. Maxim Defense MDX 505 PDX 5.56 NATO Mil-Spec Complete Upper - 5.5" Urban Grey
    Maxim Defense MDX 505 PDX 5.56 NATO Mil-Spec Complete Upper - 5.5" Urban Grey
    $1,165.50
    Out of stock
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  10. Bravo Company MFG (BCM) MK2 5.56 NATO Upper Receiver Group w/ MCMR-13 Handguard - 14.5" FDE
    Bravo Company MFG (BCM) MK2 5.56 NATO Upper Receiver Group w/ MCMR-13 Handguard - 14.5" FDE
    $736.39
    Out of stock
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  11. Quarter Circle 10 Complete AR-15 9mm PCC Upper - 5.5"
    Quarter Circle 10 Complete AR-15 9mm PCC Upper - 5.5"
    Special Price $648.99 Regular Price $864.95
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  12. R&D Precision 9mm PW9-R Bufferless Upper Kit – 16"
    R&D Precision 9mm PW9-R Bufferless Upper Kit – 16"
    $649.99
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  13. 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
    Out of stock
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  14. Sig Sauer MCX-SURG 5.56 NATO Suppressed Upper Receiver Group Upgrade Kit - 11.5"
    Sig Sauer MCX-SURG 5.56 NATO Suppressed Upper Receiver Group Upgrade Kit - 11.5"
    $4,299.99
    Out of stock
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  15. Maxim Defense SDX 508 300BLK Integrally Suppressed Upper - 8.5"
    Maxim Defense SDX 508 300BLK Integrally Suppressed Upper - 8.5"
    $2,155.50
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  16. Maxim Defense SDX 510 5.56 NATO Integrally Suppressed Upper - 10.3" Black
    Maxim Defense SDX 510 5.56 NATO Integrally Suppressed Upper - 10.3" Black
    $2,155.50
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  1. Category Complete Upper Receivers Remove This Item
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  1. 4" 1 item
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  3. 5.5" 10 items
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  5. 7.5" 2 items
  6. 7.75" 1 item
  7. 7.94" 1 item
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  2. 6.91" 1 item
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  14. 15" 8 items
  15. 15.25" 1 item
  16. 16" 1 item
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  3. 1/2x36 1 item
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Twist Rate
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  2. 1:7 20 items
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