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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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Barrel Length
  1. 4.5" 1 item
  2. 16" 2 items
Caliber
  1. .223/5.56 3 items
  2. .30 Cal 1 item
  3. 5.56 NATO 1 item
  4. 7.62mm 1 item
  5. 9mm 2 items
Category
  1. Receiver Parts 3 items
  2. Parts & Kits 11 items
  3. Barrels 1 item
  4. Buffer Systems 1 item
  5. Trigger Parts 3 items
  6. Gas Systems 1 item
  7. Muzzle Devices 14 items
  8. Grips 5 items
  9. Charging Handles 3 items
  10. Rifle Handguards 1 item
  11. Stocks & Braces 5 items
Color
Configuration
  1. AR-15 1 item
Finish
  1. Black 1 item
  2. Nitride 1 item
  3. Phosphate 1 item
  4. Red 1 item
  5. Anodize 1 item
Gas Block Diameter
  1. .625" 1 item
Gas System Length
  1. Blowback 1 item
  2. Mid 2 items
Manufacturer
  1. A3 Tactical 2 items
  2. ALG Defense 1 item
  3. Angstadt Arms 1 item
  4. Apex Tactical Specialties 1 item
  5. Ascalon Arms 1 item
  6. Black River MFG 1 item
  7. Blitzkrieg Components 1 item
  8. Bravo Company MFG (BCM) 2 items
  9. Daniel Defense 1 item
  10. Fortis MFG 3 items
  11. Forward Controls Design 5 items
  12. Half Cocked Arms (HCA) 1 item
  13. HB Industries 1 item
  14. Heresy Design 1 item
  15. Icarus Precision 2 items
  16. JK Armament 1 item
  17. JL Billet 1 item
  18. Kaw Valley Precision 1 item
  19. Krebs Customs 3 items
  20. Magpul Industries 3 items
  21. Next Level Armament 5 items
  22. Q, LLC 1 item
  23. Rainier Arms, LLC 2 items
  24. Rainier Industries 2 items
  25. Sig Sauer 1 item
  26. Sons of Liberty Gun Works 1 item
  27. Timney Triggers 1 item
  28. Tyrant Designs 2 items
  29. V Seven Weapon Systems 1 item
Model
  1. CZ Scorpion 1 item
  2. Springfield Hellcat 1 item
Mount
  1. KeyMod 1 item
  2. M-LOK 1 item
  3. Picatinny 1 item
Option
  1. AR-9 1 item
  2. AR-10 2 items
  3. AR-15 4 items
  4. 9mm 1 item
  5. CZ 1 item
  6. Springfield 1 item
  7. Serrated 1 item
Platform
  1. AR-10/LR308 3 items
  2. AR-15 1 item
  3. CZ 1 item
  4. Springfield 1 item
Product Type
  1. Angled Grip 4 items
  2. AR-10 / LR 308 Charging Handle 2 items
  3. AR-15 Barrel 1 item
  4. AR-15 Stripped Upper Receiver 2 items
  5. AR-9 Upper Receiver 1 item
  6. Buffer Kit 1 item
  7. Charging Handle 1 item
  8. Compensator 4 items
  9. Dust Cover 1 item
  10. End Cap 1 item
  11. End Plate 1 item
  12. Failure Resistant Extractor 1 item
  13. Flash Hider 4 items
  14. Forearm Accesory 1 item
  15. Gas Block 1 item
  16. Magazine Release 3 items
  17. Muzzle Brake 6 items
  18. Safety Selector 5 items
  19. Sight Post 1 item
  20. Stock 4 items
  21. Trigger 3 items
  22. Vertical Grip 1 item
Rail Length
  1. 10" 1 item
  2. 14" 1 item
Size
  1. Small 1 item
  2. X-Large 1 item
Thread Pitch
  1. 1/2x28 (9mm) 4 items
  2. 1/2x28 (.22 cal) 7 items
  3. 1/2x32 4 items
  4. 1/2x36 3 items
  5. 5/8x24 (.30 cal) 1 item
  6. M13.5x1 LH 4 items
Threaded
  1. Yes 1 item
Stock Status
  1. In stock 47 items Remove This Item
  2. Out of stock 2 items
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