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raineirarms

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 17-32 of 47

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  1. Faxon Firearms Pencil .223 Wylde AR-15 Barrel - 14.5"
    Faxon Firearms Pencil .223 Wylde AR-15 Barrel - 14.5"
    $211.60
    Out of stock
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  2. Daniel Defense DD4 RIII Complete Upper Receiver - 16" Black
    Daniel Defense DD4 RIII Complete Upper Receiver - 16" Black
    $1,499.00
    Out of stock
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  4. 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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  6. 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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  11. Rainier Arms Exclusive Faxon Firearms Chrome Lined 5.56 NATO AR-15 Barrel - 16"
    Faxon Firearms Chrome Lined 5.56 NATO AR-15 Barrel - 16"
    $219.00
    Out of stock
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  14. Lantac NITRIDED GAS TUBE
    Lantac NITRIDED GAS TUBE
    Out of stock
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  15. Faxon Firearms PENCIL .308 Win AR-10/LR308 Barrel - 16"
    Faxon Firearms PENCIL .308 Win AR-10/LR308 Barrel - 16"
    $238.28
    Out of stock
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Items 17-32 of 47

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Barrel Length
  1. 12" 2 items
  2. 12.5" 1 item
  3. 13.7" 3 items
  4. 13.9" 2 items
  5. 14.5" 8 items
  6. 16" 28 items
  7. 16.1" 2 items
  8. 18" 1 item
Barrel Profile
  1. Non-fluted 1 item
Caliber
  1. .223 Wylde 7 items
  2. .308 Win 3 items
  3. 5.56X45 1 item
  4. 5.56 NATO 27 items
  5. 6mm ARC 1 item
  6. 6.5 Grendel 1 item
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Category
  1. Receiver Parts 17 items
  2. Parts & Kits 1 item
  3. Barrels 22 items
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  6. Muzzle Devices 2 items
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  1. .625" 4 items
  2. .750" 23 items
Is Firearms?
  1. No 47 items
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  1. Ballistic Advantage 3 items
  2. Blackout Defense 1 item
  3. Bravo Company MFG (BCM) 5 items
  4. Centurion Arms 1 item
  5. Daniel Defense 2 items
  6. Faxon Firearms 9 items
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  8. Noveske 6 items
  9. Primary Weapon Systems 1 item
  10. Rainier Arms, LLC 4 items
  11. Sharps Bros 1 item
  12. Sionics Weapon Systems 1 item
  13. Sons of Liberty Gun Works 4 items
  14. Troy Industries 1 item
  15. V Seven Weapon Systems 1 item
  16. VLTOR 4 items
Mount
  1. KeyMod 7 items
  2. M-LOK 6 items
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  1. AR-15 8 items
Platform
  1. AR-10/LR308 2 items
  2. AR-15 26 items
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  1. $0.00 - $999.99 42 items
  2. $1,000.00 and above 5 items
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  1. AR-10/LR308 Barrel 3 items
  2. AR-15 Barrel 19 items
  3. AR-15 Complete Upper Receiver 9 items
  4. AR-15 Partial Upper Receiver 8 items
  5. Buffer Tube 2 items
  6. Flash Hider 2 items
  7. Gas Tube 1 item
  8. Patch 1 item
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  1. 10" 7 items
  2. 12.5" 1 item
  3. 13" 2 items
  4. 13.7" 1 item
  5. 15" 6 items
  6. 16" 1 item
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  1. 9 Slot 7 items
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  1. 1/2x28 (.22 cal) 26 items
  2. 5/8x24 (.30 cal) 5 items
Threaded
  1. Yes 5 items
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  1. 1:7 22 items
  2. 1:7.5 1 item
  3. 1:8 7 items
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  1. Out of stock 47 items Remove This Item
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