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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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Caliber
  1. .30 Cal 1 item
  2. 5.56 NATO 1 item
Category
  1. Receiver Parts 10 items
  2. Parts & Kits 5 items
  3. Buffer Systems 2 items
  4. Trigger Parts 1 item
  5. Muzzle Devices 2 items
  6. Grips 11 items
  7. Charging Handles 2 items
  8. Rifle Handguards 10 items
  9. Stocks & Braces 7 items
Color
Configuration
  1. Right Hand 1 item
Inside Diameter
  1. 1.3" 1 item
  2. 1.34" 2 items
  3. 1.39" 1 item
Manufacturer
  1. A3 Tactical 2 items
  2. Aero Precision 1 item
  3. Agency Arms 1 item
  4. Arms Republic 2 items
  5. Ballistic Advantage 1 item
  6. Centurion Arms 1 item
  7. Faxon Firearms 1 item
  8. Fortis MFG 13 items
  9. Forward Controls Design 1 item
  10. Geissele 2 items
  11. Grey Birch MFG 2 items
  12. Icon Defense 2 items
  13. JK Armament 1 item
  14. JMAC Customs 7 items
  15. JP Enterprises Inc 1 item
  16. Midwest Industries 2 items
  17. Q, LLC 3 items
  18. Rainier Arms, LLC 1 item
  19. Rise Armament 1 item
  20. Samson Manufacturing Corp. 1 item
  21. Sharps Bros 2 items
  22. Stern Defense 1 item
  23. True North Concepts 1 item
Model
  1. Sig MCX 1 item
Mount
  1. M-LOK 10 items
  2. Other 3 items
  3. Picatinny 2 items
Option
  1. AR-10 1 item
  2. AR-15 8 items
  3. B&T APC 1 item
Platform
  1. 10-22 1 item
  2. AR-10/LR308 1 item
  3. AR-15 3 items
  4. AK47/74 2 items
  5. CZ 1 item
  6. Sig Sauer 1 item
Product Type
  1. 10/22 Receiver 1 item
  2. AR-10 Receiver Set 1 item
  3. AR-10 Stripped Lower Receiver 1 item
  4. AR-15 Charging Handle 1 item
  5. AR-15 Complete Lower Receiver 1 item
  6. AR-15 Handguard 5 items
  7. AR-15 Stripped Lower Receiver 1 item
  8. AR-15 Stripped Upper Receiver 3 items
  9. Brace 1 item
  10. Buffer Tube 2 items
  11. Cable Clip 1 item
  12. Charging Handle 1 item
  13. Chassis 2 items
  14. Compensator 2 items
  15. Dust Cover 1 item
  16. End Cap 1 item
  17. Forearm Accesory 1 item
  18. Handguard 4 items
  19. Handstop 2 items
  20. Lower Parts Kit 1 item
  21. Magazine Release 1 item
  22. Pistol Grip 7 items
  23. Safety Selector 1 item
  24. Stock 2 items
  25. Stock Accessory 1 item
  26. Stock Adapter 3 items
  27. Trigger 1 item
  28. Vertical Grip 3 items
Rail Length
  1. 6.25" 2 items
  2. 6.7" 3 items
  3. 8" 1 item
  4. 9.5" 1 item
  5. 9.6" 3 items
  6. 10" 4 items
  7. 10.5" 1 item
  8. 11.8" 3 items
  9. 12.4" 1 item
  10. 12.5" 2 items
  11. 13" 2 items
  12. 13.5" 1 item
  13. 13.8" 3 items
  14. 15" 2 items
  15. 15.3" 3 items
Thread Pitch
  1. .578x28 1 item
  2. 1/2x28 (9mm) 1 item
Stock Status
  1. In stock 47 items Remove This Item
  2. Out of stock 3 items
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