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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. Surefire Socom 5.56mm 4-Prong Flash Hider - 1/2x28
    Surefire Socom 5.56mm 4-Prong Flash Hider - 1/2x28
    $179.00
  2. Rainier Arms Select 5.56 NATO AR-15 Barrel - 12.5"
    Rainier Arms Select 5.56 NATO AR-15 Barrel - 12.5"
    $195.00
  3. Rainier Arms Exclusive Spinta Precision .223 Wylde Dissipator AR-15 Barrel - 16" (Rainier Arms Exclusive)
    Spinta Precision .223 Wylde Dissipator AR-15 Barrel - 16" (Rainier Arms Exclusive)
    Special Price $149.99 Regular Price $199.99
  4. Rainier Arms RUC 5.56 NATO DI Complete Upper - 16"
    Rainier Arms RUC 5.56 NATO DI Complete Upper - 16"
    Special Price $664.00 Regular Price $830.00
  5. Milspec/GI A2 Flash Hider - 1/2x28
    Milspec/GI A2 Flash Hider - 1/2x28
    $8.00
  6. Griffin Armament M4SD Hammer Comp 5.56mm
    Griffin Armament M4SD Hammer Comp 5.56mm
    $89.95
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