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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 17-32 of 68

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  2. Nemo Arms AR-15 Battle-Light Receiver Set
    Nemo Arms AR-15 Battle-Light Receiver Set
    $475.00
    Out of stock
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  3. Faxon Firearms AR-15 9mm FX910-U Complete Upper -10.5"
    Faxon Firearms AR-15 9mm FX910-U Complete Upper -10.5"
    $492.20
    Out of stock
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  4. Angstadt Arms AR-15 0940 Receiver Set for Glock
    Angstadt Arms AR-15 0940 Receiver Set for Glock
    $420.00
    Out of stock
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  5. Lantac N15 Raven Billet Receiver Set
    Lantac N15 Raven Billet Receiver Set
    $458.99
    Out of stock
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  8. Arms Republic 9mm Complete Upper Assembly - 16"
    Arms Republic 9mm Complete Upper Assembly - 16"
    $460.00
    Out of stock
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  16. Grey Birch MFG Takedown Chassis System for Ruger 10/22
    Grey Birch MFG Takedown Chassis System for Ruger 10/22
    $499.99
    Out of stock
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Items 17-32 of 68

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Barrel Length
  1. 8.5" 1 item
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  3. 10.7" 1 item
  4. 12" 1 item
  5. 16" 8 items
  6. 18" 7 items
  7. 20" 3 items
  8. 22" 11 items
  9. 24" 1 item
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  10. 9mm 1 item
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  1. Receiver Parts 30 items
  2. Barrels 30 items
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  5. AR-15 Complete Lower Receiver 11 items
  6. AR-15 Partial Upper Receiver 4 items
  7. AR-15 Handguard 1 item
  8. AR-15 Receiver Set 4 items
  9. AR-15 Stripped Lower Receiver 1 item
  10. AR-15 Stripped Upper Receiver 1 item
  11. AR-9 Complete Lower Receiver 1 item
  12. Bolt-Action Barrel 17 items
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  17. Stock 1 item
  18. Trigger 1 item
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  1. 1:7 8 items
  2. 1:7.5 12 items
  3. 1:8 6 items
  4. 1:10 7 items
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