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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. Rainier Arms Exclusive Spinta Precision AR-15 9mm Thermal Barrel - 8” Nitride (Rainier Arms Exclusive)
    Spinta Precision AR-15 9mm Thermal Barrel - 8” Nitride (Rainier Arms Exclusive)
    Special Price $100.10 Regular Price $189.99
  2. Faxon Firearms Light Tapered 9mm AR-15 Barrel - 8.5"
    Faxon Firearms Light Tapered 9mm AR-15 Barrel - 8.5"
    $115.00
  3. Faxon Firearms Light Tapered 9mm AR-15 Barrel - 10.5"
    Faxon Firearms Light Tapered 9mm AR-15 Barrel - 10.5"
    $124.20
  4. Rainier Arms Exclusive Spinta Precision AR-15 9mm Thermal Barrel - 5.25” Nitride (Rainier Arms Exclusive)
    Spinta Precision AR-15 9mm Thermal Barrel - 5.25” Nitride (Rainier Arms Exclusive)
    Special Price $77.99 Regular Price $149.99
  5. Faxon Firearms Light Tapered 9mm AR-15 Barrel - 16"
    Faxon Firearms Light Tapered 9mm AR-15 Barrel - 16"
    $133.40
  6. R&D Precision 9mm PW9 AR-15 Barrel - 7.25"
    R&D Precision 9mm PW9 AR-15 Barrel - 7.25"
    $99.99
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