raineirarms

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. Faxon Firearms AR-10 Height 3 Screw Gas Block - .875
    Faxon Firearms AR-10 Height 3 Screw Gas Block - .875
    $39.79
  2. Faxon Firearms Big Gunner 8.6BLK AR-10/LR308 Barrel - 12"
    Faxon Firearms Big Gunner 8.6BLK AR-10/LR308 Barrel - 12"
    $219.88
  3. Faxon Firearms 458 Socom/450 Bushmaster Bolt - Nitride
    Faxon Firearms 458 Socom/450 Bushmaster Bolt - Nitride
    $78.19
  4. Faxon Firearms Stripped Forged Upper Receiver - 7075-T6
    Faxon Firearms Stripped Forged Upper Receiver - 7075-T6
    $91.99
  5. Faxon Firearms Light Tapered 9mm AR-15 Barrel - 16"
    Faxon Firearms Light Tapered 9mm AR-15 Barrel - 16"
    $133.40
  6. Faxon Firearms Light Tapered 9mm AR-15 Barrel - 10.5"
    Faxon Firearms Light Tapered 9mm AR-15 Barrel - 10.5"
    $124.20
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