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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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Items 17-23 of 23

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  1. Daniel Defense DD4 RIII S 5.56 Nato Complete Upper Receiver - 11.5" FDE
    Daniel Defense DD4 RIII S 5.56 Nato Complete Upper Receiver - 11.5" FDE
    $1,412.00
    Out of stock
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  2. Faxon Firearms AR-15 G3 STREAMLINE Aluminum M-LOK Handguard - 13"
    Faxon Firearms AR-15 G3 STREAMLINE Aluminum M-LOK Handguard - 13"
    $165.60
    Out of stock
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  3. Fortis MFG AR-15 REV 2.0 Free Float Rail System - FDE
    Fortis MFG AR-15 REV 2.0 Free Float Rail System - FDE
    Out of stock
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  4. Fortis MFG AR-15 REV 2.0 Free Float Rail System - OD Green
    Fortis MFG AR-15 REV 2.0 Free Float Rail System - OD Green
    Out of stock
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  5. Primary Weapons Systems MK1 MOD 2-M AR-15 Stripped Ambidextrous Lower Receiver
    Primary Weapons Systems MK1 MOD 2-M AR-15 Stripped Ambidextrous Lower Receiver
    $279.95
    Out of stock
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  6. Rainier Arms Exclusive Rainier Arms / Rellim Arms AR-15 .223 Wylde Take Down Upper Receiver Assembly - 8.5"
    Rainier Arms / Rellim Arms AR-15 .223 Wylde Take Down Upper Receiver Assembly - 8.5"
    $1,299.99
    Out of stock
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  7. Rainier Arms Exclusive Rainier Arms / Rellim Arms AR-15 5.56 NATO Take Down Upper Receiver Assembly - 16"
    Rainier Arms / Rellim Arms AR-15 5.56 NATO Take Down Upper Receiver Assembly - 16"
    $1,299.99
    Out of stock
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Items 17-23 of 23

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