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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. V Seven Harbinger .308 Stripped Upper Receiver
    V Seven Harbinger .308 Stripped Upper Receiver
    $392.85
  2. Triggertech Diamond AR Trigger - PVD Black Flat
    Triggertech Diamond AR Trigger - PVD Black Flat
    $304.99
  3. Sharps Bros THE JACK AR-15 Complete Lower Receiver w/o stock - Gen 2
    Sharps Bros THE JACK AR-15 Complete Lower Receiver w/o stock - Gen 2
    Special Price $319.99 Regular Price $399.95
  4. Lantac SF15 USR FORGED UPPER & LOWER SET
    Lantac SF15 USR FORGED UPPER & LOWER SET
    $305.98
  5. JP Enterprises Small Frame Billet Lower Receiver
    JP Enterprises Small Frame Billet Lower Receiver
    $375.25
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