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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. Faxon Firearms AR-15 Gunner 6mm ARC 5R Nitride Barrel - 16"
    Faxon Firearms AR-15 Gunner 6mm ARC 5R Nitride Barrel - 16"
    $225.40
    Out of stock
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  2. Ballistic Advantage Modern Series 5.56 NATO Barrel - 10.5"
    Ballistic Advantage Modern Series 5.56 NATO Barrel - 10.5"
    $142.50
    Out of stock
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  3. Centurion Arms Lightweight Hammer Forged 5.56 Barrel - 11.5"
    Centurion Arms Lightweight Hammer Forged 5.56 Barrel - 11.5"
    $285.00
    Out of stock
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  4. Rainier Arms Ultramatch MOD2 .223 Wylde Barrel - 12" Satin
    Rainier Arms Ultramatch MOD2 .223 Wylde Barrel - 12" Satin
    $400.00
    Out of stock
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  5. Noveske Stainless Lo-Pro Gas Block 7.62x51 Barrel - 12.5" Leonidas
    Noveske Stainless Lo-Pro Gas Block 7.62x51 Barrel - 12.5" Leonidas
    $475.00
    Out of stock
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  6. Noveske Leonidas CHF Chrome Lined 5.56 NATO FSB Barrel - 12.5"
    Noveske Leonidas CHF Chrome Lined 5.56 NATO FSB Barrel - 12.5"
    $530.00
    Out of stock
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  7. Noveske CHF Chrome Lined Lo-Pro Gas Block 5.56 NATO Barrel - 14.5"
    Noveske CHF Chrome Lined Lo-Pro Gas Block 5.56 NATO Barrel - 14.5"
    $522.50
    Out of stock
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  8. Noveske Recon Stainless Lo-Pro Gas Block Barrel 5.56 - 16"
    Noveske Recon Stainless Lo-Pro Gas Block Barrel 5.56 - 16"
    $418.00
    Out of stock
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  9. Noveske CHF Chrome Lined Switchblock 5.56 NATO Barrel - 10.5"
    Noveske CHF Chrome Lined Switchblock 5.56 NATO Barrel - 10.5"
    $565.25
    Out of stock
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  10. Faxon Firearms AR-15 Gunner 300BLK 4150 QPQ Barrel - 16"
    Faxon Firearms AR-15 Gunner 300BLK 4150 QPQ Barrel - 16"
    $165.30
    Out of stock
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  11. Centurion Arms Lightweight Hammer Forged 5.56 Barrel - 16"
    Centurion Arms Lightweight Hammer Forged 5.56 Barrel - 16"
    $285.00
    Out of stock
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  1. Gas Block Diameter .750" Remove This Item
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