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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. Rainier Arms Exclusive Sharps Bros Hellbreaker AR-15 Complete Lower Receiver w/o stock - Gen 2
    Sharps Bros Hellbreaker AR-15 Complete Lower Receiver w/o stock - Gen 2
    Special Price $299.99 Regular Price $399.95
  2. 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
  3. Sharps Bros Livewire AR-15 Complete Lower Receiver w/o Stock
    Sharps Bros Livewire AR-15 Complete Lower Receiver w/o Stock
    Special Price $219.99 Regular Price $269.95
  4. Sharps Bros THE JACK AR-15 Lower Receiver - Gen 2
    Sharps Bros THE JACK AR-15 Lower Receiver - Gen 2
    $275.45
  5. Sharps Bros Hellbreaker AR-15 Builders Kit - 15"
    Sharps Bros Hellbreaker AR-15 Builders Kit - 15"
    Special Price $399.99 Regular Price $600.00
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