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. Lantac GB750-S Ultra Low Profile Gas Block
    Lantac GB750-S Ultra Low Profile Gas Block
    $62.99
  2. Lantac UFA-S Ultimate Forward Assist (Solid)
    Lantac UFA-S Ultimate Forward Assist (Solid)
    $38.99
  3. Lantac RPS END PLATE & CASTLE NUT
    Lantac RPS END PLATE & CASTLE NUT
    $54.99
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