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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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  4. Hiperfire HIPERTOUCH Elite, AR15/10 Trigger Assembly
    Hiperfire HIPERTOUCH Elite, AR15/10 Trigger Assembly
    $190.00
    Out of stock
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  5. Hiperfire HIPERTOUCH Genesis, AR15/10 Trigger Assembly
    Hiperfire HIPERTOUCH Genesis, AR15/10 Trigger Assembly
    $190.00
    Out of stock
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  6. Cross Machine Tool (CMT) UPUR-1 Billet Upper Receiver
    Cross Machine Tool (CMT) UPUR-1 Billet Upper Receiver
    $198.00
    Out of stock
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  7. Ballistic Advantage Hanson 300BLK AR-15 Barrel - 8.3"
    Ballistic Advantage Hanson 300BLK AR-15 Barrel - 8.3"
    $199.50
    Out of stock
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  8. Nemo Arms 5.56 NATO AR-15 Barrel - 11.5"
    Nemo Arms 5.56 NATO AR-15 Barrel - 11.5"
    $199.00
    Out of stock
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  12. Rainier Arms Select 5.56 NATO AR-15 Barrel - 12.5"
    Rainier Arms Select 5.56 NATO AR-15 Barrel - 12.5"
    $195.00
    Out of stock
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  14. Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-1
    Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-1
    $190.00
    Out of stock
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  15. Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-2
    Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-2
    $190.00
    Out of stock
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  16. Bootleg Adjustable AR-15 Complete Bolt Carrier Group
    Bootleg Adjustable AR-15 Complete Bolt Carrier Group
    $199.95
    Out of stock
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Barrel Length
  1. 6.5" 1 item
  2. 8" 1 item
  3. 8.3" 1 item
  4. 10.5" 4 items
  5. 10.7" 1 item
  6. 11.5" 3 items
  7. 12.5" 2 items
  8. 13.7" 1 item
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  12. 18" 1 item
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  1. Receiver Parts 7 items
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  6. Muzzle Devices 1 item
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  22. SB Tactical 1 item
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  24. Sig Sauer 1 item
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  26. Timney Triggers 1 item
  27. V Seven Weapon Systems 1 item
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  1. AR-10/LR308 Barrel 1 item
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  3. AR-10 Handguard 1 item
  4. AR-15 Barrel 20 items
  5. AR-15 Handguard 1 item
  6. AR-15 Stripped Lower Receiver 2 items
  7. AR-15 Stripped Upper Receiver 4 items
  8. Bolt 1 item
  9. Bolt Carrier Group 5 items
  10. Brace 1 item
  11. Buffer Spring 2 items
  12. Gas Block 2 items
  13. Handguard 3 items
  14. Muzzle Brake 1 item
  15. Stock 1 item
  16. Trigger 8 items
Rail Length
  1. 9.55" 1 item
  2. 10.7" 1 item
  3. 11.7" 1 item
  4. 12.625" 1 item
  5. 13.7" 1 item
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  1. 1/2x28 (.22 cal) 16 items
  2. 5/8x24 (.30 cal) 6 items
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  2. Out of stock 19 items
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