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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. Rainier Arms A-DAC-F AR-15 Stripped Lower Receiver
    Rainier Arms A-DAC-F AR-15 Stripped Lower Receiver
    $140.00
    Out of stock
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Barrel Length
  1. 4" 3 items
  2. 5" 3 items
  3. 6" 4 items
  4. 6.5" 1 item
  5. 6.75" 1 item
  6. 7.5" 1 item
  7. 7.75" 1 item
  8. 8" 5 items
  9. 8.5" 4 items
  10. 10" 2 items
  11. 10.5" 14 items
  12. 10.7" 5 items
  13. 11.5" 3 items
  14. 12" 9 items
  15. 12.5" 11 items
  16. 13.9" 2 items
  17. 14.5" 10 items
  18. 16" 44 items
  19. 18" 44 items
  20. 20" 15 items
  21. 20.5" 1 item
  22. 22" 27 items
  23. 24" 2 items
  24. 26" 2 items
Barrel Profile
  1. Dissipator 1 item
  2. Lightweight 9 items
  3. M110 1 item
  4. M16A1 1 item
  5. MK12 SPR 5 items
  6. Non-fluted 2 items
Caliber
  1. .22 ARC 4 items
  2. .223/5.56 1 item
  3. .223 Wylde 34 items
  4. .308 Win 31 items
  5. .45 ACP 1 item
  6. 300 Blackout 17 items
  7. 350 Legend 2 items
  8. 5.56 NATO 24 items
  9. 6mm ARC 14 items
  10. 6.5 Creedmoor 24 items
  11. 6.5 Grendel 10 items
  12. 6.5 PRC 2 items
  13. 6MM Creedmoor 17 items
  14. 7.62x51 4 items
  15. 8.6 Blackout 6 items
  16. 9mm 17 items
Category
  1. Receiver Parts 28 items
  2. Parts & Kits 8 items
  3. Barrels 195 items
  4. Buffer Systems 1 item
  5. Trigger Parts 1 item
  6. Gas Systems 6 items
  7. Muzzle Devices 8 items
  8. Bolt Parts 4 items
  9. Charging Handles 2 items
  10. Rifle Handguards 2 items
  11. Stocks & Braces 1 item
  12. MILSPEC Parts 1 item
Color
Configuration
  1. AR-15 1 item
  2. .625 DIA 1 item
  3. .750 DIA 1 item
  4. .800 DIA 2 items
  5. .875 DIA 1 item
  6. .936 DIA 1 item
Finish
  1. Melonite 1 item
  2. Nickel Boron 2 items
  3. Nitride 69 items
  4. Phosphate 1 item
  5. Polished 47 items
  6. Satin 81 items
  7. Anodize 1 item
  8. Titanium Nitride (TiN) 1 item
Gas Block Diameter
  1. .625" 11 items
  2. .750" 109 items
  3. .875" 21 items
  4. .936" 5 items
Gas System Length
  1. Blowback 16 items
  2. Pistol -1 3 items
  3. Pistol 23 items
  4. Carbine 18 items
  5. Mid 34 items
  6. Intermediate 10 items
  7. Rifle 48 items
  8. Rifle +1 5 items
  9. Rifle +2 16 items
Height
  1. Absolute Co-Witness 1 item
Mount
  1. M-LOK 5 items
  2. Picatinny 1 item
Option
  1. AR-9 1 item
  2. AR-10 2 items
  3. AR-15 6 items
  4. WA 2 items
  5. KS 2 items
  6. Adjustable 1 item
  7. Non-Adjustable 2 items
Platform
  1. AR-10/LR308 38 items
  2. AR-15 119 items
  3. Remington 700 14 items
  4. Ruger Precision Rifle 12 items
  5. Savage Small Shank 15 items
  6. Sig Cross 4 items
Price
  1. $0.00 - $99.99 27 items
  2. $100.00 - $199.99 27 items
  3. $200.00 - $299.99 63 items
  4. $300.00 - $399.99 36 items
  5. $400.00 - $499.99 89 items
  6. $500.00 - $599.99 6 items
  7. $600.00 - $699.99 7 items
  8. $700.00 and above 2 items
Product Type
  1. AR-10/LR308 Barrel 38 items
  2. AR-10 Receiver Set 1 item
  3. AR-10 Stripped Upper Receiver 1 item
  4. AR-15 Assembled Upper Receiver 1 item
  5. AR-15 Barrel 111 items
  6. AR-15 Complete Lower Receiver 2 items
  7. AR-15 Complete Upper Receiver 1 item
  8. AR-15 Partial Upper Receiver 11 items
  9. AR-15 Handguard 2 items
  10. AR-15 Receiver Set 2 items
  11. AR-15 Stripped Lower Receiver 5 items
  12. AR-15 Stripped Upper Receiver 1 item
  13. Bolt-Action Barrel 46 items
  14. Bolt Carrier Group 2 items
  15. Buffer Kit 1 item
  16. Cam Pin 1 item
  17. Charging Handle 2 items
  18. Compensator 4 items
  19. End Plate 1 item
  20. Flash Hider 2 items
  21. Gas Block 2 items
  22. Gas Tube 3 items
  23. Handguard 1 item
  24. Magazine Catch 1 item
  25. Magazine Release 2 items
  26. Magwell 1 item
  27. Muzzle Brake 2 items
  28. Parts Kit 1 item
  29. Safety Selector 2 items
  30. Stock Adapter 1 item
  31. Trigger Guard 1 item
Rail Length
  1. 7" 2 items
  2. 9" 1 item
  3. 9.5" 3 items
  4. 9.55" 4 items
  5. 10.7" 3 items
  6. 11.7" 2 items
  7. 11.75" 1 item
  8. 12" 2 items
  9. 13" 1 item
  10. 13.7" 3 items
  11. 14" 1 item
  12. 15" 5 items
Size
  1. 9 Slot 1 item
Thread Pitch
  1. 1/2x28 (9mm) 17 items
  2. 1/2x28 (.22 cal) 65 items
  3. 1/2x36 2 items
  4. 3/4x24 1 item
  5. 5/8x24 (.30 cal) 126 items
  6. M18x1.5 2 items
Threaded
  1. Yes 6 items
  2. No 1 item
Twist Rate
  1. 1:3 6 items
  2. 1:7 32 items
  3. 1:7.5 34 items
  4. 1:8 76 items
  5. 1:10 53 items
Stock Status
  1. In stock 192 items
  2. Out of stock 65 items
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