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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. Ballistic Advantage BA-10 Upper Receiver
    Ballistic Advantage BA-10 Upper Receiver
    $142.50
  2. Silencerco SCO15 Billet AR15 Upper Receiver
    Silencerco SCO15 Billet AR15 Upper Receiver
    $219.00
  3. SLR Rifleworks AR-15 SLR-B15 Billet Upper Receivers
    SLR Rifleworks AR-15 SLR-B15 Billet Upper Receivers
    $249.00
  4. Sons of Liberty Gun Works Stripped Upper Receiver
    Sons of Liberty Gun Works Stripped Upper Receiver
    $142.50
  5. Lantac UAR Upper Advanced Receiver inc CP-R360 Cam Pin
    Lantac UAR Upper Advanced Receiver inc CP-R360 Cam Pin
    $229.99
  6. Battle Arms Development Lightweight Billet Upper Receiver
    Battle Arms Development Lightweight Billet Upper Receiver
    $239.00
  7. V Seven Weapon Systems 7075 Billet Enlightened AR15 Upper
    V Seven Weapon Systems 7075 Billet Enlightened AR15 Upper
    $287.12
  8. Cross Machine Tool (CMT) UPUR-1 Billet Upper Receiver
    Cross Machine Tool (CMT) UPUR-1 Billet Upper Receiver
    $198.00
  9. Hera Arms HUS AR-15 Billet Upper Receivers
    Hera Arms HUS AR-15 Billet Upper Receivers
    $139.00
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