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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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  4. Midwest Industries MCX Virtus M-LOK Handguard
    Midwest Industries MCX Virtus M-LOK Handguard
    Out of stock
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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. Sharps Bros Hellbreaker AR-15 Builders Kit - 15"
    Sharps Bros Hellbreaker AR-15 Builders Kit - 15"
    Special Price $399.99 Regular Price $600.00
    Out of stock
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  10. Noveske NSR GEN 3 AR-15 Handguard - 15"
    Noveske NSR GEN 3 AR-15 Handguard - 15"
    $280.25
    Out of stock
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Barrel Length
  1. 10.5" 3 items
  2. 11.5" 1 item
  3. 12.5" 2 items
  4. 14.5" 1 item
  5. 16" 11 items
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  1. Non-fluted 2 items
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  2. 5.56 NATO 9 items
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  1. AR-10 Handguard 5 items
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  7. Parts Kit 2 items
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  1. 1/2x28 (9mm) 1 item
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