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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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  7. Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 16"
    Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 16"
    $855.00
    Out of stock
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  8. Dead Foot Arms AR-15 AR-SD 9MM Upper Assembly
    Dead Foot Arms AR-15 AR-SD 9MM Upper Assembly
    Out of stock
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  11. Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 13.7"
    Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 13.7"
    $950.00
    Out of stock
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  12. Huxwrx Muzzle Brake-QD 762 Suppressor Mount
    Huxwrx Muzzle Brake-QD 762 Suppressor Mount
    Out of stock
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  13. Huxwrx Muzzle Brake-QD 556 Suppressor Mount - 1/2x28
    Huxwrx Muzzle Brake-QD 556 Suppressor Mount - 1/2x28
    $143.00
    Out of stock
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  14. JMAC Customs 360HD 1/2-28 FaceMount HUB
    JMAC Customs 360HD 1/2-28 FaceMount HUB
    $116.96
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  15. Sig Sauer MCX Spear - LT 7.62X39 Complete Upper 11.5"
    Sig Sauer MCX Spear - LT 7.62X39 Complete Upper 11.5"
    $1,999.99
    Out of stock
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  16. JMAC Customs BDS-37 Blast Shield
    JMAC Customs BDS-37 Blast Shield
    $76.45
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Items 33-48 of 68

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