Memorial Weekend Sale - 12% OFF Sitewide

*Some Exclusions Apply, EXCLUDES DEALERS & DISTRIBUTORS,  DISCOUNTS DO NOT STACK, DISCOUNT APPLIED AT CHECKOUT (SALE GOOD FROM 5/22-5/26) EXCLUDES: ATLAS, KUSTOMWORX, LAUGO ARMS, LMT, NIGHTHAWK, & STACCATO

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Partial Upper Receivers

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  7. Rainier Arms RUC Pro MK2 5.56 NATO Partial Upper Receiver
    Rainier Arms RUC Pro MK2 5.56 NATO Partial Upper Receiver
    $600.00 - $650.00
    Starting at 0% APR or $29.95/mo with . Learn More
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Shopping Options
Barrel Length
  1. 7" 1 item
  2. 7.5" 1 item
  3. 8" 1 item
  4. 8.5" 2 items
  5. 8.75" 1 item
  6. 9" 3 items
  7. 10.5" 7 items
  8. 10.7" 1 item
  9. 11.5" 6 items
  10. 12" 1 item
  11. 12.5" 4 items
  12. 13" 1 item
  13. 13.7" 2 items
  14. 14.5" 6 items
  15. 16" 12 items
  16. 18" 2 items
Barrel Profile
  1. MK12 SPR 1 item
  2. Non-fluted 2 items
Caliber
  1. .223/5.56 1 item
  2. .223 Wylde 2 items
  3. 300 Blackout 7 items
  4. 5.56X45 4 items
  5. 5.56 NATO 19 items
  6. 9mm 2 items
Color
Finish
  1. Quench Polish Quench (QPQ) 1 item
Gas Block Diameter
  1. .750" 13 items
Gas System
  1. Pistol 1 item
  2. Carbine 5 items
  3. Mid 12 items
  4. Rifle 1 item
Height
  1. Absolute Co-Witness 1 item
Inside Diameter
  1. 1.3" 1 item
  2. 1.6" 1 item
Manufacturer
  1. Aero Precision 1 item
  2. Bootleg 2 items
  3. Bravo Company MFG (BCM) 15 items
  4. Lewis Machine & Tool (LMT) 11 items
  5. MCM Firearms 1 item
  6. Quarter Circle 10 1 item
  7. Radian Weapons 1 item
  8. Rainier Arms, LLC 12 items
  9. Sons of Liberty Gun Works 7 items
Mount
  1. M-LOK 14 items
  2. Picatinny 2 items
Platform
  1. AR-9 1 item
  2. AR-10/LR308 1 item
  3. AR-15 19 items
Price
  1. $0.00 - $999.99 47 items
  2. $1,000.00 and above 4 items
Product Type
  1. AR-10 Partial Upper Receiver 3 items
  2. AR-15 Complete Upper Receiver 1 item
  3. AR-15 Partial Upper Receiver 44 items
  4. AR-15 Stripped Upper Receiver 1 item
  5. AR-9 Partial Upper Receiver 1 item
  6. Partial Upper Receiver 1 item
Rail Length
  1. 5" 1 item
  2. 7" 3 items
  3. 7.25" 1 item
  4. 8" 2 items
  5. 9.2" 1 item
  6. 9.25" 1 item
  7. 9.5" 4 items
  8. 9.55" 4 items
  9. 10" 2 items
  10. 10.5" 1 item
  11. 10.7" 2 items
  12. 11" 1 item
  13. 11.5" 2 items
  14. 11.7" 2 items
  15. 11.75" 1 item
  16. 12.5" 1 item
  17. 12.75" 1 item
  18. 13" 3 items
  19. 13.25" 2 items
  20. 13.7" 2 items
  21. 14" 1 item
  22. 15" 7 items
  23. 15.3" 1 item
  24. 15.5" 1 item
Thread Pitch
  1. 1/2x28 (.22 cal) 15 items
  2. 5/8x24 (.30 cal) 4 items
Threaded
  1. Yes 12 items
  2. No 1 item
Twist Rate
  1. 1:7 17 items
  2. 1:8 1 item
Stock Status
  1. In stock 21 items
  2. Out of stock 30 items
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