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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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  1. Barrel Length 16" Remove This Item
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Barrel Profile
  1. Dissipator 2 items
  2. Non-fluted 1 item
Caliber
  1. .223/5.56 1 item
  2. .223 Wylde 6 items
  3. .308 1 item
  4. .308 Win 6 items
  5. .458 Socom 1 item
  6. 300 Blackout 2 items
  7. 5.56X45 1 item
  8. 5.56 NATO 16 items
  9. 7.62x51 2 items
  10. 8.6 Blackout 2 items
  11. 9mm 5 items
Category
  1. Receiver Parts 12 items
  2. Parts & Kits 2 items
  3. Barrels 25 items
  4. Buffer Systems 2 items
  5. Gas Systems 1 item
  6. Muzzle Devices 1 item
  7. Bolt Parts 1 item
  8. Grips 1 item
  9. Stocks & Braces 1 item
Color
Configuration
  1. M-LOK 4 items
Finish
  1. Chrome 1 item
  2. Nitride 10 items
  3. Polished 2 items
  4. Satin 4 items
  5. Anodize 1 item
Gas Block Diameter
  1. .625" 2 items
  2. .750" 17 items
  3. .875" 1 item
Gas System Length
  1. Blowback 3 items
  2. Pistol 2 items
  3. Carbine 3 items
  4. Mid 25 items
  5. Intermediate 2 items
  6. Rifle 2 items
Height
  1. Absolute Co-Witness 2 items
Manufacturer
  1. Angstadt Arms 1 item
  2. Ballistic Advantage 2 items
  3. Bravo Company MFG (BCM) 5 items
  4. Centurion Arms 1 item
  5. Faxon Firearms 10 items
  6. Lewis Machine & Tool (LMT) 1 item
  7. Noveske 3 items
  8. Patriot Ordnance Factory (POF) 1 item
  9. Rainier Arms, LLC 11 items
  10. Sons of Liberty Gun Works 2 items
  11. Spinta Precision 1 item
  12. Stag Arms 1 item
  13. Troy Industries 1 item
  14. VKTR Industries 1 item
  15. VLTOR 3 items
Mount
  1. KeyMod 7 items
  2. M-LOK 4 items
  3. Picatinny 2 items
Option
  1. AR-15 9 items
Platform
  1. AR-10/LR308 3 items
  2. AR-15 21 items
  3. Remington 700 2 items
  4. Savage Small Shank 2 items
Product Type
  1. AR-10/LR308 Barrel 3 items
  2. AR-15 Barrel 17 items
  3. AR-15 Complete Upper Receiver 4 items
  4. AR-15 Partial Upper Receiver 6 items
  5. Bolt-Action Barrel 5 items
  6. Buffer Tube 2 items
  7. Cam Pin 1 item
  8. Complete Upper 2 items
  9. End Plate 1 item
  10. Flash Hider 1 item
  11. Patch 1 item
Rail Length
  1. 9.5" 1 item
  2. 10" 7 items
  3. 12" 2 items
  4. 15" 6 items
Size
  1. 9 Slot 9 items
Thread Pitch
  1. 1/2x28 (9mm) 2 items
  2. 1/2x28 (.22 cal) 15 items
  3. 1/2x36 1 item
  4. 5/8x24 (.30 cal) 8 items
  5. 11/16x24 1 item
Threaded
  1. Yes 2 items
Twist Rate
  1. 1:3 2 items
  2. 1:7 10 items
  3. 1:7.5 1 item
  4. 1:8 8 items
  5. 1:10 10 items
  6. 1:14 1 item
Stock Status
  1. Out of stock 46 items Remove This Item
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