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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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  7. Rainier Industries .223/5.56 Flash Hider - 1/2x28
    Rainier Industries .223/5.56 Flash Hider - 1/2x28
    $65.00
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  8. Rainier Industries .223/5.56 Muzzle Brake - 1/2x28
    Rainier Industries .223/5.56 Muzzle Brake - 1/2x28
    $65.00
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  14. Rise Armament .223/5.56 Low-Mass Bolt Carrier Group
    Rise Armament .223/5.56 Low-Mass Bolt Carrier Group
    $229.99 - $249.99
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  1. Caliber .223/5.56 Remove This Item
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Barrel Length
  1. 8.5" 1 item
  2. 10.3" 1 item
  3. 10.5" 1 item
  4. 11.5" 2 items
  5. 12.5" 1 item
  6. 14.5" 1 item
  7. 16" 3 items
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  1. Receiver Parts 2 items
  2. Parts & Kits 1 item
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  17. Taran Tactical Innovations 1 item
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  1. $0.00 - $999.99 22 items
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  1. AR-15 Complete Upper Receiver 1 item
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  1. 9.55" 1 item
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  3. 12" 1 item
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