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Rifle Parts

Whether you're building a new rifle from scratch or looking to upgrade an existing firearm, our vast selection of rifle parts has everything you are going to need in that journey. At Rainier Arms' selection of rifle parts, you can find a wide variety of products including lower and upper parts, trigger parts, muzzle devices, and many more. 

Explore our selection of high-quality parts coming from various leading manufacturers like Strike Industries, Magpul, BCM, and many more.

Also, don't forget to check our specially-made Rainier Arms barrels for your firearms.

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  3. Faxon Firearms Gunner 5.56 NATO AR-15 QPQ Barrel - 20"
    Faxon Firearms Gunner 5.56 NATO AR-15 QPQ Barrel - 20"
    $188.60
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Items 129-131 of 131

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Barrel Length
  1. 3.1" 1 item
  2. 4" 1 item
  3. 4.5" 1 item
  4. 5" 1 item
  5. 5.25" 2 items
  6. 6" 3 items
  7. 6.5" 1 item
  8. 7.5" 1 item
  9. 8" 6 items
  10. 8.5" 4 items
  11. 9" 1 item
  12. 10.3" 1 item
  13. 10.5" 12 items
  14. 10.7" 2 items
  15. 11.5" 2 items
  16. 12" 4 items
  17. 12.5" 6 items
  18. 13.7" 1 item
  19. 13.9" 3 items
  20. 14.5" 6 items
  21. 16" 27 items
  22. 16.1" 1 item
  23. 18" 12 items
  24. 20" 10 items
  25. 20.5" 1 item
  26. 22" 3 items
Barrel Profile
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  5. Non-fluted 1 item
Caliber
  1. .22 LR 2 items
  2. .223/5.56 2 items
  3. .223 Wylde 17 items
  4. .308 1 item
  5. .308 Win 7 items
  6. .458 Socom 2 items
  7. 300 Blackout 10 items
  8. 350 Legend 2 items
  9. 5.56 NATO 29 items
  10. 6mm ARC 6 items
  11. 6.5 Creedmoor 6 items
  12. 6.5 Grendel 2 items
  13. 6MM Creedmoor 1 item
  14. 7.62x39 1 item
  15. 7.62x51 5 items
  16. 8.6 Blackout 9 items
  17. 9mm 16 items
Category
  1. Barrels 113 items
  2. Gas Systems 3 items
  3. Muzzle Devices 10 items
  4. Bolt Parts 4 items
  5. Charging Handles 1 item
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Gas Block Diameter
  1. .625" 13 items
  2. .750" 72 items
  3. .875" 7 items
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  3. Pistol 15 items
  4. Carbine 15 items
  5. Mid 28 items
  6. Intermediate 3 items
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  8. Rifle +2 4 items
Manufacturer
  1. Aero Precision 1 item
  2. Aeroknox 1 item
  3. Ballistic Advantage 1 item
  4. Battle Arms Development 3 items
  5. Faxon Firearms 36 items
  6. Fortis MFG 2 items
  7. Forward Controls Design 2 items
  8. Grey Birch MFG 1 item
  9. JMAC Customs 4 items
  10. Kinetic Development Group 1 item
  11. Lewis Machine & Tool (LMT) 1 item
  12. Rainier Arms, LLC 69 items
  13. Spinta Precision 5 items
  14. Taran Tactical Innovations 1 item
  15. VKTR Industries 3 items
Option
  1. AR-9 1 item
  2. AR-15 1 item
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Platform
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  2. AR-15 82 items
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  1. $0.00 - $99.99 13 items
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  5. $400.00 - $499.99 4 items
  6. $800.00 and above 1 item
Product Type
  1. 10/22 Barrel 2 items
  2. AR-10/LR308 Barrel 24 items
  3. AR-15 Barrel 83 items
  4. Bolt 1 item
  5. Bolt-Action Barrel 4 items
  6. Bolt Carrier Group 3 items
  7. Charging Handle 1 item
  8. Compensator 1 item
  9. Flash Hider 2 items
  10. Gas Block 2 items
  11. Gas Tube 1 item
  12. Muzzle Brake 7 items
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  1. 1/2x28 (9mm) 12 items
  2. 1/2x28 (.22 cal) 52 items
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  4. 5/8x24 (.30 cal) 44 items
  5. 11/16x24 2 items
  6. M14x1 LH 2 items
  7. M18x1.5 5 items
  8. M24x1.5 RH 1 item
  9. 26-1.5 LH 1 item
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  1. 1:3 9 items
  2. 1:7 16 items
  3. 1:7.5 9 items
  4. 1:8 47 items
  5. 1:10 27 items
  6. 1:11.25 1 item
  7. 1:14 2 items
  8. 1:16 2 items
Stock Status
  1. In stock 93 items
  2. Out of stock 38 items
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