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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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Items 113-128 of 132

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  1. Faxon Firearms .458 Socom 4150 Nitride Gunner Barrel - 16"
    Faxon Firearms .458 Socom 4150 Nitride Gunner Barrel - 16"
    $257.60
    Out of stock
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  2. Faxon Firearms AR-15 Match Series .223 Wylde 416R Nitride Barrel - 16"
    Faxon Firearms AR-15 Match Series .223 Wylde 416R Nitride Barrel - 16"
    $216.20
    Out of stock
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  3. Faxon Firearms AR-15 9mm FX916-U Complete Upper -16"
    Faxon Firearms AR-15 9mm FX916-U Complete Upper -16"
    $506.60
    Out of stock
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  4. Noveske Recon Stainless Lo-Pro Gas Block Barrel 5.56 - 16"
    Noveske Recon Stainless Lo-Pro Gas Block Barrel 5.56 - 16"
    $418.00
    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
    Out of stock
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  6. Rainier Arms UltraMatch MOD2 9mm AR-15 Barrel - 16" Polished
    Rainier Arms UltraMatch MOD2 9mm AR-15 Barrel - 16" Polished
    $209.00
    Out of stock
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  7. Rainier Arms Ultramatch MOD2 .223 Wylde AR-15 Barrel - 16" Nitride
    Rainier Arms Ultramatch MOD2 .223 Wylde AR-15 Barrel - 16" Nitride
    $400.00
    Out of stock
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  8. Rainier Arms Select 5.56 NATO Dissipator AR-15 Barrel - 16"
    Rainier Arms Select 5.56 NATO Dissipator AR-15 Barrel - 16"
    $195.00
    Out of stock
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  9. Rainier Arms Ultramatch MOD2 Remington 700 .308 Win Bolt-Action Barrel - 16" Satin
    Rainier Arms Ultramatch MOD2 Remington 700 .308 Win Bolt-Action Barrel - 16" Satin
    $400.00
    Out of stock
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  10. Rainier Arms Match Savage Small Shank 8.6BLK Bolt-Action Barrel - 16" Nitride
    Rainier Arms Match Savage Small Shank 8.6BLK Bolt-Action Barrel - 16" Nitride
    $350.00
    Out of stock
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  11. Rainier Arms Match Remington 700 8.6BLK Bolt-Action Barrel - 16" Nitride
    Rainier Arms Match Remington 700 8.6BLK Bolt-Action Barrel - 16" Nitride
    $350.00
    Out of stock
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  12. 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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  13. R&D Precision 9mm PW9-R Bufferless Upper Kit – 16"
    R&D Precision 9mm PW9-R Bufferless Upper Kit – 16"
    $649.99
    Out of stock
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  14. Rainier Arms Exclusive Spinta Precision .223 Wylde Dissipator Barrel - 16" (Rainier Arms Exclusive)
    Spinta Precision .223 Wylde Dissipator Barrel - 16" (Rainier Arms Exclusive)
    Special Price $149.99 Regular Price $199.99
    Out of stock
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  15. 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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  16. Sons Of Liberty Gun Works 5.56mm CHF V2 AR-15 Combat Barrel - 16"
    Sons Of Liberty Gun Works 5.56mm CHF V2 AR-15 Combat Barrel - 16"
    $299.25
    Out of stock
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Items 113-128 of 132

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  1. Barrel Length 16" Remove This Item
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Barrel Profile
  1. Dissipator 1 item
  2. Lightweight 3 items
  3. Non-fluted 2 items
  4. MK12 SPR 1 item
Caliber
  1. .22 LR 2 items
  2. .223/5.56 3 items
  3. .223 Rem 1 item
  4. .223 Wylde 11 items
  5. .308 2 items
  6. .308 Win 15 items
  7. .458 Socom 1 item
  8. 300 Blackout 7 items
  9. 5.56X45 2 items
  10. 5.56 NATO 36 items
  11. 6mm ARC 6 items
  12. 6.5 Creedmoor 2 items
  13. 6.5 Grendel 3 items
  14. 6.8 SPC 1 item
  15. 7.62x39 2 items
  16. 7.62x51 4 items
  17. 8.6 Blackout 3 items
  18. 9mm 11 items
Category
  1. Receiver Parts 28 items
  2. Parts & Kits 3 items
  3. Barrels 53 items
  4. Rifle Barrels 36 items
  5. Buffer Systems 4 items
  6. Gas Systems 1 item
  7. Muzzle Devices 4 items
  8. Bolt Parts 1 item
  9. Grips 1 item
  10. Stocks & Braces 3 items
Color
Configuration
  1. M-LOK 4 items
  2. .750 DIA 8 items
Finish
  1. Bead Blast 2 items
  2. Carbon Fiber 1 item
  3. Chrome 1 item
  4. Nitride 19 items
  5. Phosphate 1 item
  6. Polished 9 items
  7. Satin 15 items
  8. Anodize 1 item
  9. PVD/CVD 1 item
  10. Quench Polish Quench (QPQ) 1 item
Gas Block Diameter
  1. .625" 4 items
  2. .750" 56 items
  3. .875" 1 item
Gas System Length
  1. Blowback 4 items
  2. Pistol 9 items
  3. Carbine 10 items
  4. Mid 70 items
  5. Intermediate 8 items
  6. Rifle 11 items
Height
  1. Absolute Co-Witness 2 items
Inside Diameter
  1. 1.3" 1 item
Is Firearms?
  1. No 132 items
Manufacturer
  1. Aero Precision 1 item
  2. Angstadt Arms 3 items
  3. Arms Republic 1 item
  4. Ballistic Advantage 7 items
  5. Blackout Defense 1 item
  6. Bootleg 1 item
  7. Boss Barrels 6 items
  8. Bravo Company MFG (BCM) 6 items
  9. Centurion Arms 1 item
  10. Christensen Arms 1 item
  11. Daniel Defense 3 items
  12. Faxon Firearms 22 items
  13. Geissele 1 item
  14. Lewis Machine & Tool (LMT) 3 items
  15. Magpul Industries 2 items
  16. Noveske 6 items
  17. Patriot Ordnance Factory (POF) 1 item
  18. Precision Armament 1 item
  19. Primary Weapon Systems 1 item
  20. R&D Precision 1 item
  21. Rainier Arms, LLC 43 items
  22. Sharps Bros 1 item
  23. Sons of Liberty Gun Works 5 items
  24. Spinta Precision 1 item
  25. Stag Arms 1 item
  26. Troy Industries 1 item
  27. V Seven Weapon Systems 1 item
  28. VKTR Industries 1 item
  29. VLTOR 7 items
Mount
  1. KeyMod 13 items
  2. M-LOK 7 items
  3. Picatinny 3 items
Option
  1. AR-10 1 item
  2. AR-15 15 items
  3. Mid Length 1 item
  4. 9mm 1 item
  5. Non-Adjustable 1 item
Platform
  1. AR-10/LR308 9 items
  2. AR-15 44 items
  3. Remington 700 2 items
  4. Ruger Precision Rifle 2 items
  5. Savage Small Shank 3 items
  6. Sig Cross 2 items
Price
  1. $0.00 - $999.99 126 items
  2. $1,000.00 and above 6 items
Product Type
  1. AR-10/LR308 Barrel 9 items
  2. AR-15 Barrel 34 items
  3. AR-15 Complete Upper Receiver 12 items
  4. AR-15 Partial Upper Receiver 11 items
  5. AR-15 Stripped Upper Receiver 1 item
  6. AR-9 Upper Receiver 1 item
  7. Barrel 34 items
  8. Bolt-Action Barrel 10 items
  9. Buffer Kit 1 item
  10. Buffer Tube 3 items
  11. Cam Pin 1 item
  12. Complete Upper 3 items
  13. End Plate 1 item
  14. Flash Hider 3 items
  15. Muzzle Brake 1 item
  16. Parts Kit 1 item
  17. Patch 1 item
  18. Stock 2 items
Rail Length
  1. 9.2" 1 item
  2. 9.5" 1 item
  3. 9.55" 1 item
  4. 10" 13 items
  5. 10.7" 1 item
  6. 11" 1 item
  7. 11.7" 1 item
  8. 12" 2 items
  9. 12.5" 2 items
  10. 13.7" 1 item
  11. 14" 1 item
  12. 15" 15 items
Size
  1. Small 1 item
  2. X-Large 2 items
  3. 9 Slot 13 items
Thread Pitch
  1. 1/2x28 47 items
  2. 1/2x36 1 item
  3. 5/8x24 37 items
  4. M18x1.5 1 item
Threaded
  1. Yes 19 items
Twist Rate
  1. 1:3 3 items
  2. 1:7 28 items
  3. 1:7.5 7 items
  4. 1:8 21 items
  5. 1:10 24 items
  6. 1:16 1 item
Stock Status
  1. In stock 90 items
  2. Out of stock 42 items
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