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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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  6. Rainier Arms Ultramatch MOD2 6.5 Grendel Barrel - 12.5"
    Rainier Arms Ultramatch MOD2 6.5 Grendel Barrel - 12.5"
    As low as $400.00
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  7. Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver - 12.5"
    Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver - 12.5"
    As low as $600.00
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  15. 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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  16. 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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