raineirarms

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. Faxon Firearms Light Tapered 9mm AR-15 Barrel - 10.5"
    Faxon Firearms Light Tapered 9mm AR-15 Barrel - 10.5"
    $124.20
  2. JMAC Customs RRD-2C 28 Slim 9mm Muzzle Brake - 1/2x28
    JMAC Customs RRD-2C 28 Slim 9mm Muzzle Brake - 1/2x28
    $53.96
  3. Forward Controls Design PF-040 Takedown/Pivot Pins
    Forward Controls Design PF-040 Takedown/Pivot Pins
    $33.25
  4. Lantac UFA-S Ultimate Forward Assist (Solid)
    Lantac UFA-S Ultimate Forward Assist (Solid)
    $38.99
  5. Nemo Arms AR-15 Battle-Light Receiver Set
    Nemo Arms AR-15 Battle-Light Receiver Set
    $475.00
  6. HB Industries CZ Scorpion EVO3 DELTA Trigger
    HB Industries CZ Scorpion EVO3 DELTA Trigger
  7. Nemo Arms Titanium Take Down Pin Set
    Nemo Arms Titanium Take Down Pin Set
  8. Nemo Arms .223/5.56 Bolt Carrier Group (BCG)
    Nemo Arms .223/5.56 Bolt Carrier Group (BCG)
    $170.00
  9. Nemo Arms 5.56 NATO AR-15 Barrel - 11.5"
    Nemo Arms 5.56 NATO AR-15 Barrel - 11.5"
    $199.00
  10. SLR Rifleworks AR-15 SLR-B15 Ambi Billet Receiver Set
    SLR Rifleworks AR-15 SLR-B15 Ambi Billet Receiver Set
    $551.24
  11. SLR Rifleworks .308/7.62 SLR-B30 Ambi Billet Receiver Set
    SLR Rifleworks .308/7.62 SLR-B30 Ambi Billet Receiver Set
    $639.44
  12. Faxon Firearms Ultra Low-Profile Gas Block - .625
    Faxon Firearms Ultra Low-Profile Gas Block - .625
    $33.11
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