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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. Aero Precision AR15 Atlas S-One Handguard 15" - FDE
    Aero Precision AR15 Atlas S-One Handguard 15" - FDE
    $219.99
  2. Bravo Company MFG QRF Quad Rail Handguard - 7"
    Bravo Company MFG QRF Quad Rail Handguard - 7"
    $206.95
  3. Silencerco SCO15 Billet AR15 Lower Receiver
    Silencerco SCO15 Billet AR15 Lower Receiver
    $269.00
  4. Silencerco SCO15 Billet AR15 Upper Receiver
    Silencerco SCO15 Billet AR15 Upper Receiver
    $219.00
  5. Rainier Arms UltraMatch Billet Upper - MOD 3
    Rainier Arms UltraMatch Billet Upper - MOD 3
    $204.95
  6. Lantac UAR Upper Advanced Receiver inc CP-R360 Cam Pin
    Lantac UAR Upper Advanced Receiver inc CP-R360 Cam Pin
    $229.99
  7. Battle Arms Development Lightweight Billet Upper Receiver
    Battle Arms Development Lightweight Billet Upper Receiver
    $239.00
  8. V Seven Weapon Systems 7075 Billet Enlightened AR15 Upper
    V Seven Weapon Systems 7075 Billet Enlightened AR15 Upper
    $287.12
  9. Sharps Bros THE JACK AR-15 Lower Receiver - Gen 2
    Sharps Bros THE JACK AR-15 Lower Receiver - Gen 2
    $275.45
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