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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. Ribbons Pre Order Noveske NSR GEN 3 AR-15 Handguard - 7.2"
    Noveske NSR GEN 3 AR-15 Handguard - 7.2"
    $242.25
    Out of stock
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  8. Lewis Machine & Tool (LMT) Sopmod Buttstock - Black
    Lewis Machine & Tool (LMT) Sopmod Buttstock - Black
    $205.20
    Out of stock
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  9. Bravo Company MFG (BCM) Raider M10 M-LOK Handguard - 10"
    Bravo Company MFG (BCM) Raider M10 M-LOK Handguard - 10"
    $239.00
    Out of stock
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  10. Radian Weapons Vertex Trigger - Flat Bow
    Radian Weapons Vertex Trigger - Flat Bow
    $229.95
    Out of stock
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  11. Faxon Firearms Pencil .223 Wylde AR-15 Barrel - 14.5"
    Faxon Firearms Pencil .223 Wylde AR-15 Barrel - 14.5"
    $211.60
    Out of stock
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  12. Q LLC Literally The Best Trigger Ever Made
    Q LLC Literally The Best Trigger Ever Made
    $299.00
    Out of stock
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  13. Noveske NSR Gen 4 AR-15 M-LOK Handguard - 13.5"
    Noveske NSR Gen 4 AR-15 M-LOK Handguard - 13.5"
    $280.25
    Out of stock
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  1. Platform AR-15 Remove This Item
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  5. 7.75" 1 item
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  8. 10.5" 9 items
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  1. AR-15 3 items
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  1. AR-15 Barrel 91 items
  2. AR-15 Complete Lower Receiver 1 item
  3. AR-15 Handguard 12 items
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  6. Bolt Carrier Group 1 item
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  10. Trigger 4 items
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  1. 7.2" 2 items
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  10. 13.5" 2 items
  11. 15" 3 items
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  1. 1/2x28 (9mm) 13 items
  2. 1/2x28 (.22 cal) 42 items
  3. 5/8x24 (.30 cal) 30 items
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  1. 1:7 22 items
  2. 1:7.5 7 items
  3. 1:8 43 items
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