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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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  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. 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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  3. VLTOR A5 Spring & Buffer Kit
    VLTOR A5 Spring & Buffer Kit
    $59.36
    Out of stock
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  4. Troy Industries Ambidextrous Magazine Release
    Troy Industries Ambidextrous Magazine Release
    $58.00
    Out of stock
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  5. VLTOR Flash Hider - VC:301
    VLTOR Flash Hider - VC:301
    $59.36
    Out of stock
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  6. Young Mfg Aluminum Railed Gas Block - .750
    Young Mfg Aluminum Railed Gas Block - .750
    $39.00
    Out of stock
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  7. Young Mfg National Match LITE Bolt Carrier Group
    Young Mfg National Match LITE Bolt Carrier Group
    $265.00
    Out of stock
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  8. 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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  9. 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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  10. Bravo Company MFG (BCM) MK2 BFH 5.56 NATO Mid-Length Upper Receiver Group (ELW) w/ MCMR-15 Handguard - 16"
    Bravo Company MFG (BCM) MK2 BFH 5.56 NATO Mid-Length Upper Receiver Group (ELW) w/ MCMR-15 Handguard - 16"
    $805.99
    Out of stock
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  11. Faxon Firearms Gunner AR-15 5.56 NATO Barrel w/ Integral 3 Port Brake - 16"
    Faxon Firearms Gunner AR-15 5.56 NATO Barrel w/ Integral 3 Port Brake - 16"
    $239.20
    Out of stock
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  12. Faxon Firearms Tapered AR-15 9MM Barrel w/ Integral Muzzle Brake - 16"
    Faxon Firearms Tapered AR-15 9MM Barrel w/ Integral Muzzle Brake - 16"
    $202.40
    Out of stock
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  13. Faxon Firearms AR-15 Match Series .223 Wylde, 416R, QPQ, 5R Flame Barrel - 16
    Faxon Firearms AR-15 Match Series .223 Wylde, 416R, QPQ, 5R Flame Barrel - 16
    $289.80
    Out of stock
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  14. Bravo Company MFG (BCM) AR-15 BFH Upper Receiver Group - 16"
    Bravo Company MFG (BCM) AR-15 BFH Upper Receiver Group - 16"
    $594.00
    Out of stock
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  15. V Seven Weapon Systems 308 WIN Stainless Match Barrel - 16.1"
    V Seven Weapon Systems 308 WIN Stainless Match Barrel - 16.1"
    $583.94
    Out of stock
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  16. Faxon Firearms PENCIL .308 WIN, Mid-Length, 4150 QPQ Nitride - 16"
    Faxon Firearms PENCIL .308 WIN, Mid-Length, 4150 QPQ Nitride - 16"
    $238.28
    Out of stock
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  1. .223 Wylde 3 items
  2. .308 Win 2 items
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  4. 300 Blackout 1 item
  5. 5.56 NATO 11 items
  6. 6mm ARC 1 item
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  8. 9mm 5 items
Category
  1. Receiver Parts 14 items
  2. Parts & Kits 1 item
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  1. $0.00 - $999.99 32 items
  2. $1,000.00 and above 3 items
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  1. AR-15 Complete Upper Receiver 6 items
  2. AR-15 Partial Upper Receiver 4 items
  3. AR-9 Upper Receiver 1 item
  4. Barrel 15 items
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  6. Buffer Kit 1 item
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  8. Flash Hider 1 item
  9. Patch 1 item
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