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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. Fortis MFG LA Stock Bundle Pack
    Fortis MFG LA Stock Bundle Pack
    Out of stock
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  7. Sharps Bros THE JACK AR-15 Complete Lower Receiver w/o stock - Gen 2
    Sharps Bros THE JACK AR-15 Complete Lower Receiver w/o stock - Gen 2
    Special Price $319.99 Regular Price $399.95
    Out of stock
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  9. Centurion Arms C4 Rail System - Mid Cutout
    Centurion Arms C4 Rail System - Mid Cutout
    $314.00
    Out of stock
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  11. JP Enterprises Small Frame Billet Lower Receiver
    JP Enterprises Small Frame Billet Lower Receiver
    $375.25
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  13. V Seven Harbinger .308 Stripped Upper Receiver
    V Seven Harbinger .308 Stripped Upper Receiver
    $392.85
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  14. Geissele Super Sabra Trigger Pack
    Geissele Super Sabra Trigger Pack
    $355.00
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  15. 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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  16. Geissele Super Scar Trigger
    Geissele Super Scar Trigger
    $330.00
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Items 1-16 of 48

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Barrel Length
  1. 6.5" 1 item
  2. 8" 1 item
  3. 10.5" 1 item
  4. 11.5" 1 item
  5. 12.5" 1 item
  6. 14.5" 1 item
  7. 16" 2 items
  8. 18" 3 items
  9. 20" 2 items
  10. 22" 1 item
Barrel Profile
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  3. 300 Blackout 1 item
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  2. Barrels 14 items
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  5. Rifle Handguards 7 items
  6. Stocks & Braces 4 items
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  10. $390.00 and above 8 items
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  1. AR-10/LR308 Barrel 2 items
  2. AR-10 Stripped Upper Receiver 1 item
  3. AR-15 Barrel 9 items
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  5. AR-15 Handguard 5 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
  11. Bolt Carrier Group 3 items
  12. Brace 1 item
  13. Handguard 2 items
  14. Iron Sight 1 item
  15. Parts Kit 1 item
  16. Stock 3 items
  17. Trigger 6 items
Rail Length
  1. 6.25" 1 item
  2. 9.3" 1 item
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  4. 13" 1 item
  5. 13.5" 1 item
  6. 13.625" 1 item
  7. 15" 3 items
  8. 17" 1 item
Thread Pitch
  1. 1/2x28 (.22 cal) 7 items
  2. 5/8x24 (.30 cal) 7 items
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