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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. 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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  2. 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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  3. Ballistic Advantage Modern Series 5.56 Goverment Barrel - 20"
    Ballistic Advantage Modern Series 5.56 Goverment Barrel - 20"
    $185.25
    Out of stock
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  4. Ballistic Advantage Modern Series 300BLK Barrel - 9"
    Ballistic Advantage Modern Series 300BLK Barrel - 9"
    $152.00
    Out of stock
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  5. Ballistic Advantage Modern Series 5.56 NATO Government Profile Barrel - 11.5"
    Ballistic Advantage Modern Series 5.56 NATO Government Profile Barrel - 11.5"
    $147.25
    Out of stock
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  6. 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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  7. Ballistic Advantage Modern Series 300BLK Barrel - 10.5"
    Ballistic Advantage Modern Series 300BLK Barrel - 10.5"
    $156.75
    Out of stock
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  8. Ballistic Advantage Modern Series 5.56 Government Barrel - 12.5"
    Ballistic Advantage Modern Series 5.56 Government Barrel - 12.5"
    $152.00
    Out of stock
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  9. Ballistic Advantage Modern Series .308 Government Barrel - 12.5"
    Ballistic Advantage Modern Series .308 Government Barrel - 12.5"
    $199.50
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  10. Ballistic Advantage Performance Series 5.56 Hanson Barrel - 13.7"
    Ballistic Advantage Performance Series 5.56 Hanson Barrel - 13.7"
    $223.25
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  11. Ballistic Advantage Premium Series 416R SS 6MM ARC Barrel - 20" DMR
    Ballistic Advantage Premium Series 416R SS 6MM ARC Barrel - 20" DMR
    $261.25
    Out of stock
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  12. Faxon Firearms Big Gunner .308 WIN, Mid-Length, 4150 QPQ Nitride Barrel - 16"
    Faxon Firearms Big Gunner .308 WIN, Mid-Length, 4150 QPQ Nitride Barrel - 16"
    $219.88
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  13. Faxon Firearms AR-15 Heavy Fluted Profile 6mm ARC 5R Nitride Barrel - 20"
    Faxon Firearms AR-15 Heavy Fluted Profile 6mm ARC 5R Nitride Barrel - 20"
    $312.80
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  14. Faxon Firearms AR-15 Gunner 6mm ARC 5R Nitride Barrel - 12.5"
    Faxon Firearms AR-15 Gunner 6mm ARC 5R Nitride Barrel - 12.5"
    $216.20
    Out of stock
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  15. 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"
    $503.50
    Out of stock
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  16. 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
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  1. Gas Block Diameter .750" Remove This Item
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