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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. Noveske N4 Afghan Gen 4 5.56 NATO Complete Upper - 14.5" Black
    Noveske N4 Afghan Gen 4 5.56 NATO Complete Upper - 14.5" Black
    $1,448.75
    Out of stock
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  2. Noveske N4 Recon Gen 4 5.56 NATO Complete Upper - 16" Black
    Noveske N4 Recon Gen 4 5.56 NATO Complete Upper - 16" Black
    $1,496.25
    Out of stock
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  3. Noveske AR-15 N4 5.56 NATO SPR Upper - 18"
    Noveske AR-15 N4 5.56 NATO SPR Upper - 18"
    $1,543.75
    Out of stock
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  4. Surefire Socom 5.56mm 4-Prong Flash Hider - 1/2x28
    Surefire Socom 5.56mm 4-Prong Flash Hider - 1/2x28
    $152.00
    Out of stock
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  5. Icon Defense Tru-Core Black Shell/Copper PVD Core .223/5.56 Muzzle Brake - 1/2x28
    Icon Defense Tru-Core Black Shell/Copper PVD Core .223/5.56 Muzzle Brake - 1/2x28
    $119.00
    Out of stock
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  6. Faxon 20" Gunner, 5.56 NATO, Rifle-Length, 4150 QPQ
    Faxon 20" Gunner, 5.56 NATO, Rifle-Length, 4150 QPQ
    $189.05
    Out of stock
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  7. Fortis MFG RED Brake 5.56mm
    Fortis MFG RED Brake 5.56mm
    Out of stock
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Items 81-87 of 87

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  2. No 1 item
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