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. JK Armament 105LT CCX 9MM Flash Cut End Cap
    JK Armament 105LT CCX 9MM Flash Cut End Cap
    $46.80
  2. Kaw Valley Precision 9mm AR-15 Barrel - 4.5"
    Kaw Valley Precision 9mm AR-15 Barrel - 4.5"
    Special Price $59.92 Regular Price $99.95
  3. Shooting Innovations AR-15 9MM Ramped Barrel - 6"
    Shooting Innovations AR-15 9MM Ramped Barrel - 6"
    Special Price $74.92 Regular Price $139.49
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