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raineirarms

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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Items 33-48 of 52

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  1. Maxim Defense 1913 Picatinny Rail Mount Brace - Black
    Maxim Defense 1913 Picatinny Rail Mount Brace - Black
    $314.96
    Out of stock
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  4. Geissele Super Sabra Trigger Pack
    Geissele Super Sabra Trigger Pack
    $355.00
    Out of stock
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  5. Bravo Company MFG (BCM) Lower Group w/ Mod 0 Stock Black
    Bravo Company MFG (BCM) Lower Group w/ Mod 0 Stock Black
    $395.00
    Out of stock
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  6. Geissele Super Scar Trigger
    Geissele Super Scar Trigger
    $330.00
    Out of stock
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  7. Geissele MK8 AR-15 Super Modular Rail - DDC
    Geissele MK8 AR-15 Super Modular Rail - DDC
    Out of stock
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  8. Battle Arms Development VERT STOCK SYSTEM-PDW Stock
    Battle Arms Development VERT STOCK SYSTEM-PDW Stock
    $399.00
    Out of stock
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  13. Fortis MFG LA Stock
    Fortis MFG LA Stock
    $332.45
    Out of stock
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  14. Lantac SF15 USR FORGED UPPER & LOWER SET
    Lantac SF15 USR FORGED UPPER & LOWER SET
    $305.98
    Out of stock
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Items 33-48 of 52

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Barrel Length
  1. 6.5" 1 item
  2. 8" 1 item
  3. 10.5" 1 item
  4. 12.5" 1 item
  5. 13.7" 1 item
  6. 14.5" 2 items
  7. 16" 2 items
  8. 18" 3 items
  9. 20" 2 items
  10. 22" 1 item
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  3. 300 Blackout 1 item
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  1. Receiver Parts 12 items
  2. Barrels 15 items
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  16. Lewis Machine & Tool (LMT) 1 item
  17. Maxim Defense 1 item
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  20. Precision Reflex Inc 1 item
  21. Rainier Arms, LLC 7 items
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  24. Triggertech 1 item
  25. Troy Industries 1 item
  26. V Seven Weapon Systems 2 items
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  9. $380.00 - $389.99 1 item
  10. $390.00 and above 9 items
Product Type
  1. AR-10/LR308 Barrel 2 items
  2. AR-10 Stripped Upper Receiver 1 item
  3. AR-15 Barrel 10 items
  4. AR-15 Complete Lower Receiver 4 items
  5. AR-15 Handguard 8 items
  6. AR-15 Receiver Set 2 items
  7. AR-15 Stripped Lower Receiver 3 items
  8. AR-15 Stripped Upper Receiver 1 item
  9. AR-9 Receiver Set 1 item
  10. Bolt-Action Barrel 3 items
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  12. Brace 2 items
  13. Handguard 3 items
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  15. Stock 4 items
  16. Trigger 4 items
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  1. 6.25" 1 item
  2. 9.3" 1 item
  3. 10.5" 1 item
  4. 10.64" 1 item
  5. 11.5" 1 item
  6. 12.5" 1 item
  7. 13" 1 item
  8. 13.5" 1 item
  9. 13.625" 1 item
  10. 15" 2 items
  11. 17" 1 item
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  1. 1/2x28 (.22 cal) 8 items
  2. 5/8x24 (.30 cal) 7 items
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  2. 1:7 7 items
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