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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. Geissele Super 7.62 Charging Handle - Black
    Geissele Super 7.62 Charging Handle - Black
    $140.00
    Out of stock
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  3. 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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  4. Noveske Super Badass Ambi Charging Handle 7.62 Black
    Noveske Super Badass Ambi Charging Handle 7.62 Black
    $133.00
    Out of stock
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  6. V Seven Weapon Systems Harbinger .308/7.62 Receiver Set
    V Seven Weapon Systems Harbinger .308/7.62 Receiver Set
    $769.21
    Out of stock
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  7. 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. V Seven Harbinger .308 Stripped Upper Receiver
    V Seven Harbinger .308 Stripped Upper Receiver
    $392.85
    Out of stock
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  11. Nemo Arms Titanium Take Down Pin Set
    Nemo Arms Titanium Take Down Pin Set
    Out of stock
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  14. Rainier Arms Ultramatch .308 Billet Upper Receiver MOD 3
    Rainier Arms Ultramatch .308 Billet Upper Receiver MOD 3
    $269.99
    Out of stock
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  15. Magpul MOE Rail Pieces 9 Slot - Black
    Magpul MOE Rail Pieces 9 Slot - Black
    $9.45
    Out of stock
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  16. Magpul BAD Lever
    Magpul BAD Lever
    $31.30
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  1. Price $0.00 - $999.99 Remove This Item
  2. Option AR-10 Remove This Item
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Barrel Length
  1. 16" 1 item
  2. 18" 7 items
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  1. .223/5.56 1 item
  2. .30 Cal 1 item
  3. .308 3 items
  4. 7.62x51 1 item
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  1. Receiver Parts 11 items
  2. Parts & Kits 4 items
  3. Buffer Systems 4 items
  4. Gas Systems 1 item
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  1. AR-10 / LR 308 Charging Handle 4 items
  2. AR-10 Complete Lower Receiver 1 item
  3. AR-10 Complete Upper Receiver 1 item
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  5. AR-10 Receiver Set 1 item
  6. AR-10 Stripped Lower Receiver 4 items
  7. AR-10 Stripped Upper Receiver 4 items
  8. AR-15 Charging Handle 1 item
  9. Bolt 1 item
  10. Bolt Carrier Group 3 items
  11. Bolt Catch 2 items
  12. Buffer Spring 5 items
  13. Charging Handle 4 items
  14. Cheek Riser 2 items
  15. Compensator 3 items
  16. Firing Pin 1 item
  17. Flash Hider 1 item
  18. Forearm Accesory 3 items
  19. Gas Block 1 item
  20. Stock 1 item
  21. Take Down / Pivot Pins 1 item
  22. Upper Parts Kit 2 items
Rail Length
  1. 12" 7 items
  2. 14" 1 item
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  4. 16.5" 1 item
  5. 17" 1 item
  6. 18" 1 item
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  1. Small 1 item
  2. 9 Slot 6 items
Thread Pitch
  1. 1/2x28 (.22 cal) 4 items
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  1. In stock 27 items
  2. Out of stock 23 items
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