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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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  2. Sharps Bros AR-15 Billet Assembled Upper Receiver
    Sharps Bros AR-15 Billet Assembled Upper Receiver
    $194.70
    Out of stock
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  6. Rainier Arms Select 300BLK AR-15 Barrel - 10.7"
    Rainier Arms Select 300BLK AR-15 Barrel - 10.7"
    $195.00
    Out of stock
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  7. Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-1
    Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-1
    $190.00
    Out of stock
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  8. Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-2
    Hiperfire Xtreme 2 Stage AR15/10 Trigger Assembly - Mod-2
    $190.00
    Out of stock
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  11. Rainier Arms Select 5.56 NATO AR-15 Barrel - 12.5"
    Rainier Arms Select 5.56 NATO AR-15 Barrel - 12.5"
    $195.00
    Out of stock
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  13. WMD Guns AR15 Bolt Carrier Group - NiB-X (Black)
    WMD Guns AR15 Bolt Carrier Group - NiB-X (Black)
    $190.00
    Out of stock
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  14. Bootleg Adjustable AR-15 Complete Bolt Carrier Group
    Bootleg Adjustable AR-15 Complete Bolt Carrier Group
    $199.95
    Out of stock
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  15. Aero Precision M5 (.308) ASSEMBLED UPPER RECEIVER - BLK
    Aero Precision M5 (.308) ASSEMBLED UPPER RECEIVER - BLK
    $194.99
    Out of stock
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  16. Hiperfire HIPERTOUCH Elite, AR15/10 Trigger Assembly
    Hiperfire HIPERTOUCH Elite, AR15/10 Trigger Assembly
    $190.00
    Out of stock
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Barrel Length
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