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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. Nemo Arms Titanium Take Down Pin Set
    Nemo Arms Titanium Take Down Pin Set
  2. Aero Precision AR-15 M4E1 Stripped Lower Receiver - FDE
    Aero Precision AR-15 M4E1 Stripped Lower Receiver - FDE
    $159.99
  3. WMD Guns AR15 Bolt Carrier Group - NiB-X
    WMD Guns AR15 Bolt Carrier Group - NiB-X
    $164.00
  4. Silencerco SCO15 Billet AR15 Lower Receiver
    Silencerco SCO15 Billet AR15 Lower Receiver
    $269.00
  5. Silencerco SCO15 Billet AR15 Upper Receiver
    Silencerco SCO15 Billet AR15 Upper Receiver
    $219.00
  6. VLTOR AR15 Charging Handle - Ambidextrous Latch
    VLTOR AR15 Charging Handle - Ambidextrous Latch
    $95.36
  7. Aeroknox Butterfly Brake .223/5.56
    Aeroknox Butterfly Brake .223/5.56
    $90.00
  8. Aeroknox Field Pins
    Aeroknox Field Pins
    $37.00
  9. Aero Precision AR15 Stripped Lower Receiver Gen 2 - FDE
    Aero Precision AR15 Stripped Lower Receiver Gen 2 - FDE
    $139.99
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