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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. Aero Precision EPC-9 Receiver Set - Black
    Aero Precision EPC-9 Receiver Set - Black
    $334.98
    Out of stock
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  6. Centurion Arms Hard Chrome Bolt Carrier Group w/ V2 Bolt
    Centurion Arms Hard Chrome Bolt Carrier Group w/ V2 Bolt
    $308.75
    Out of stock
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  12. Sharps Bros Hellbreaker AR-15 Builders Kit - 15"
    Sharps Bros Hellbreaker AR-15 Builders Kit - 15"
    Special Price $399.99 Regular Price $600.00
    Out of stock
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  14. Geissele Super Semi-Automatic SSA X Trigger
    Geissele Super Semi-Automatic SSA X Trigger
    $330.00
    Out of stock
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  15. Geissele Super Semi-Automatic SSA-E X Trigger
    Geissele Super Semi-Automatic SSA-E X Trigger
    $330.00
    Out of stock
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  16. Fostech ECHO AK-47 Platform Trigger
    Fostech ECHO AK-47 Platform Trigger
    Special Price $380.92 Regular Price $439.99
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Barrel Length
  1. 6.5" 1 item
  2. 8" 1 item
  3. 10.5" 1 item
  4. 11.5" 1 item
  5. 12.5" 1 item
  6. 14.5" 1 item
  7. 16" 2 items
  8. 18" 3 items
  9. 20" 2 items
  10. 22" 1 item
Barrel Profile
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  3. 300 Blackout 1 item
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  2. Barrels 14 items
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  8. AR-15 Stripped Upper Receiver 1 item
  9. AR-9 Receiver Set 1 item
  10. Bolt-Action Barrel 3 items
  11. Bolt Carrier Group 3 items
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  14. Iron Sight 1 item
  15. Parts Kit 1 item
  16. Stock 3 items
  17. Trigger 6 items
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  1. 6.25" 1 item
  2. 9.3" 1 item
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  4. 13" 1 item
  5. 13.5" 1 item
  6. 13.625" 1 item
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  8. 17" 1 item
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