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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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  3. Faxon Firearms GUNNER 5.56 3-Port Muzzle Brake
    Faxon Firearms GUNNER 5.56 3-Port Muzzle Brake
    $55.19
    Out of stock
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  6. Faxon Firearms Pencil .223 Wylde AR-15 Barrel - 14.5"
    Faxon Firearms Pencil .223 Wylde AR-15 Barrel - 14.5"
    $211.60
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  10. Lantac Dragon Muzzle Brake .223/556
    Lantac Dragon Muzzle Brake .223/556
    $128.99
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  13. 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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  14. Primary Weapons Systems CQB Compensator
    Primary Weapons Systems CQB Compensator
    Out of stock
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  1. Thread Pitch 1/2x28 (.22 cal) Remove This Item
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  1. 10.3" 1 item
  2. 10.5" 6 items
  3. 11.5" 6 items
  4. 12" 2 items
  5. 12.5" 5 items
  6. 13.7" 2 items
  7. 13.9" 1 item
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  9. 16" 13 items
  10. 16.1" 1 item
  11. 18" 9 items
  12. 20" 4 items
  13. 22" 2 items
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  5. 5.56 NATO 43 items
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  7. 9mm 1 item
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  1. Receiver Parts 8 items
  2. Parts & Kits 1 item
  3. Barrels 47 items
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  10. $900.00 and above 1 item
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  1. AR-15 Barrel 47 items
  2. AR-15 Partial Upper Receiver 7 items
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  2. 9.55" 1 item
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