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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. A3 Tactical Skelestock Modular Folding Stock w/ Sig Mount - 9.5"
    A3 Tactical Skelestock Modular Folding Stock w/ Sig Mount - 9.5"
    $279.95
    Out of stock
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  2. Midwest Industries Alpha Series Folding Stock
    Midwest Industries Alpha Series Folding Stock
    $274.95
    Out of stock
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  3. Troy Industries Battle Rail Drop-In Delta Handguard - Carbine Gas Length
    Troy Industries Battle Rail Drop-In Delta Handguard - Carbine Gas Length
    $276.00
    Out of stock
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  4. 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
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  5. Geissele MK14 AR-15 Super Modular Rail
    Geissele MK14 AR-15 Super Modular Rail
    Out of stock
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