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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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  11. Rainier Arms RUC DI 300BLK Partial Upper Receiver - 10.7"
    Rainier Arms RUC DI 300BLK Partial Upper Receiver - 10.7"
    Special Price $400.00 Regular Price $500.00
    Out of stock
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  12. Angstadt Arms 16″ 9mm Complete Upper Assembly
    Angstadt Arms 16″ 9mm Complete Upper Assembly
    $629.00
    Out of stock
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  13. Lantac Dragon Muzzle Brake .223/556
    Lantac Dragon Muzzle Brake .223/556
    $128.99
    Out of stock
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  2. 8.3" 2 items
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  5. 10.7" 1 item
  6. 11.5" 3 items
  7. 11.85" 1 item
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  10. 13.7" 3 items
  11. 13.9" 1 item
  12. 14.5" 2 items
  13. 16" 8 items
  14. 18" 2 items
  15. 20" 1 item
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  9. 7.62mm 4 items
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  1. .750" 15 items
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  1. $0.00 - $999.99 61 items
  2. $1,000.00 and above 6 items
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  9. Muzzle Brake 18 items
  10. Muzzle Device Accessory 1 item
  11. Parts Kit 1 item
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  1. 9.2" 1 item
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  3. 9.55" 3 items
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  11. 15.25" 1 item
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