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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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  7. Bravo Company MFG (BCM) GUNFIGHTER Vertical Grip Short Mod 3-Picatinny
    Bravo Company MFG (BCM) GUNFIGHTER Vertical Grip Short Mod 3-Picatinny
    $19.95
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  8. Bravo Company MFG (BCM) GUNFIGHTER KAG - 1913 Picatinny
    Bravo Company MFG (BCM) GUNFIGHTER KAG - 1913 Picatinny
    $19.95
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  9. Strike Industries Stacked Angled Grip w/ Cable Management System (Picatinny)
    Strike Industries Stacked Angled Grip w/ Cable Management System (Picatinny)
    $21.95
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  12. A3 Tactical Triangle Stock w/ Cheek Rest & Buttpad - 1913 Picatinny
    A3 Tactical Triangle Stock w/ Cheek Rest & Buttpad - 1913 Picatinny
    $113.95 - $208.95
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  13. A3 Tactical Triangle Stock - 1913 Picatinny
    A3 Tactical Triangle Stock - 1913 Picatinny
    $94.95 - $189.95
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Items 49-64 of 74

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Barrel Length
  1. 7" 3 items
  2. 10.3" 2 items
  3. 16" 3 items
  4. 16.1" 2 items
  5. 16.3" 1 item
  6. 18" 12 items
Caliber
  1. .223/5.56 1 item
  2. .308 1 item
  3. 300 Blackout 2 items
  4. 5.56 NATO 2 items
  5. 9mm 4 items
Category
  1. Receiver Parts 4 items
  2. Parts & Kits 6 items
  3. Buffer Systems 1 item
  4. Muzzle Devices 1 item
  5. Bolt Parts 2 items
  6. Grips 21 items
  7. Rifle Handguards 18 items
  8. Stocks & Braces 20 items
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  1. Absolute Co-Witness 1 item
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  1. 1.31" 1 item
Is Firearms?
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  1. A3 Tactical 16 items
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  3. Bravo Company MFG (BCM) 3 items
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  10. HB Industries 1 item
  11. HERA ARMS 2 items
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  13. JMAC Customs 4 items
  14. JP Enterprises Inc 3 items
  15. Lewis Machine & Tool (LMT) 1 item
  16. Magpul Industries 10 items
  17. Maxim Defense 1 item
  18. Midwest Industries 1 item
  19. Noveske 4 items
  20. Patriot Ordnance Factory (POF) 1 item
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  25. True North Concepts 1 item
  26. Tyrant Designs 1 item
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  1. AR-10 7 items
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  1. AR-15 3 items
Price
  1. $0.00 - $999.99 70 items
  2. $1,000.00 and above 4 items
Product Type
  1. Angled Grip 9 items
  2. AR-15 Assembled Upper Receiver 1 item
  3. AR-15 Complete Upper Receiver 2 items
  4. AR-15 Handguard 5 items
  5. Bolt 2 items
  6. Brace 1 item
  7. Buffer Tube 1 item
  8. Cam Pin 1 item
  9. Chassis 1 item
  10. Cheek Riser 2 items
  11. End Plate 1 item
  12. Finger Stop 1 item
  13. Flash Hider 1 item
  14. Forearm Accesory 5 items
  15. Front Sight 1 item
  16. Grip Accessory 2 items
  17. Handguard 2 items
  18. Handstop 4 items
  19. Lower Parts Kit 1 item
  20. Parts Kit 3 items
  21. Pistol Grip 1 item
  22. Rail Adapter 3 items
  23. Rail Panel 3 items
  24. Rail Section 1 item
  25. Stock 10 items
  26. Stock Accessory 1 item
  27. Stock Adapter 5 items
  28. Take Down / Pivot Pins 1 item
  29. Vertical Grip 5 items
Rail Length
  1. 7.9" 1 item
  2. 9" 1 item
  3. 9.1" 1 item
  4. 9.5" 3 items
  5. 9.55" 1 item
  6. 10" 1 item
  7. 11.5" 2 items
  8. 11.75" 1 item
  9. 12" 17 items
  10. 12.55" 1 item
  11. 12.6" 3 items
  12. 13.25" 1 item
  13. 14" 1 item
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  1. Small 1 item
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  1. 1/2x28 4 items
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Threaded
  1. Yes 3 items
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  1. 1:10 2 items
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  1. In stock 74 items Remove This Item
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