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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. 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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  5. A3 Tactical Triangle Stock - 1913 Picatinny
    A3 Tactical Triangle Stock - 1913 Picatinny
    $94.95 - $189.95
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  13. 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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  14. Bravo Company MFG (BCM) GUNFIGHTER KAG - 1913 Picatinny
    Bravo Company MFG (BCM) GUNFIGHTER KAG - 1913 Picatinny
    $19.95
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  15. Hera Arms CQR Front Grip
    Hera Arms CQR Front Grip
    $39.00
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Items 49-64 of 76

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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 5 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 21 items
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  1. AR-15 10 items
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  1. Absolute Co-Witness 1 item
Inside Diameter
  1. 1.31" 1 item
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  1. A3 Tactical 16 items
  2. Arisaka 2 items
  3. Bravo Company MFG (BCM) 3 items
  4. Brigand Arms 1 item
  5. Centurion Arms 3 items
  6. Daniel Defense 2 items
  7. Drew Meyers Defense 1 item
  8. Emissary Development 2 items
  9. Forward Controls Design 2 items
  10. HB Industries 1 item
  11. HERA ARMS 2 items
  12. Heresy Design 3 items
  13. JMAC Customs 4 items
  14. JP Enterprises Inc 3 items
  15. Lewis Machine & Tool (LMT) 2 items
  16. Magpul Industries 10 items
  17. Maxim Defense 2 items
  18. Midwest Industries 1 item
  19. Noveske 4 items
  20. Patriot Ordnance Factory (POF) 1 item
  21. Rainier Industries 1 item
  22. Rehv Arms 2 items
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  24. Strike Industries 4 items
  25. True North Concepts 1 item
  26. Tyrant Designs 1 item
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  1. AR-10 7 items
  2. AR-15 15 items
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  1. AR-10 1 item
  2. AR-15 3 items
Price
  1. $0.00 - $999.99 71 items
  2. $1,000.00 and above 5 items
Product Type
  1. Angled Grip 9 items
  2. AR-10 Partial Upper Receiver 1 item
  3. AR-15 Assembled Upper Receiver 1 item
  4. AR-15 Complete Upper Receiver 2 items
  5. AR-15 Handguard 5 items
  6. Bolt 2 items
  7. Brace 2 items
  8. Buffer Tube 1 item
  9. Cam Pin 1 item
  10. Chassis 1 item
  11. Cheek Riser 2 items
  12. End Plate 1 item
  13. Finger Stop 1 item
  14. Flash Hider 1 item
  15. Forearm Accesory 5 items
  16. Front Sight 1 item
  17. Grip Accessory 2 items
  18. Handguard 2 items
  19. Handstop 4 items
  20. Lower Parts Kit 1 item
  21. Parts Kit 3 items
  22. Pistol Grip 1 item
  23. Rail Adapter 3 items
  24. Rail Panel 3 items
  25. Rail Section 1 item
  26. Stock 10 items
  27. Stock Accessory 1 item
  28. Stock Adapter 5 items
  29. Take Down / Pivot Pins 1 item
  30. 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. 12.75" 1 item
  13. 13.25" 1 item
  14. 14" 1 item
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  1. Small 1 item
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  3. 9 Slot 9 items
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  1. 1/2x28 4 items
  2. 5/8x24 1 item
Threaded
  1. Yes 3 items
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  1. 1:10 2 items
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  1. In stock 76 items Remove This Item
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