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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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  2. Magpul MOE Rail Pieces 9 Slot - Black
    Magpul MOE Rail Pieces 9 Slot - Black
    $9.45
    Out of stock
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  3. Magpul BAD Lever
    Magpul BAD Lever
    $31.30
    Out of stock
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  4. V Seven Harbinger .308 Stripped Upper Receiver
    V Seven Harbinger .308 Stripped Upper Receiver
    $392.85
    Out of stock
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  6. Heavy Buffer CAR-10 Buffer and .308 Carbine Buffer Spring
    Heavy Buffer CAR-10 Buffer and .308 Carbine Buffer Spring
    $115.00
    Out of stock
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  8. Aero Precision M5 (.308) ASSEMBLED UPPER RECEIVER - BLK
    Aero Precision M5 (.308) ASSEMBLED UPPER RECEIVER - BLK
    $194.99
    Out of stock
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  9. Nemo Arms Titanium Take Down Pin Set
    Nemo Arms Titanium Take Down Pin Set
    Out of stock
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  10. Rainier Arms Ultramatch .308 Billet Upper Receiver MOD 3
    Rainier Arms Ultramatch .308 Billet Upper Receiver MOD 3
    $269.99
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  12. Aero Precision M5 Atlas R-One M-Lok Handguard - 15"
    Aero Precision M5 Atlas R-One M-Lok Handguard - 15"
    $224.99
    Out of stock
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  15. Aero Precision Upper Parts Kit
    Aero Precision Upper Parts Kit
    Out of stock
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  1. Price $0.00 - $999.99 Remove This Item
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Barrel Length
  1. 16" 1 item
  2. 18" 7 items
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  2. .30 Cal 1 item
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  4. 7.62x51 1 item
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  1. Receiver Parts 11 items
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  1. AR-10 / LR 308 Charging Handle 4 items
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  3. AR-10 Complete Upper Receiver 1 item
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  7. AR-10 Stripped Upper Receiver 4 items
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  22. Upper Parts Kit 2 items
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  1. 12" 7 items
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  2. 9 Slot 6 items
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  1. 1/2x28 (.22 cal) 4 items
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  2. Out of stock 21 items
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