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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. 8" 1 item
  2. 11.5" 1 item
Caliber
  1. .30 Cal 1 item
  2. 300 Blackout 1 item
  3. 5.56 NATO 2 items
Category
  1. Receiver Parts 12 items
  2. Parts & Kits 5 items
  3. Buffer Systems 2 items
  4. Trigger Parts 1 item
  5. Muzzle Devices 2 items
  6. Grips 10 items
  7. Charging Handles 2 items
  8. Rifle Handguards 10 items
  9. Stocks & Braces 7 items
Color
Configuration
  1. Right Hand 1 item
Gas Block Diameter
  1. .750" 1 item
Gas System Length
  1. Pistol 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. Daniel Defense 1 item
  8. Faxon Firearms 1 item
  9. Fortis MFG 13 items
  10. Forward Controls Design 1 item
  11. Geissele 2 items
  12. Grey Birch MFG 2 items
  13. Icon Defense 2 items
  14. JK Armament 1 item
  15. JMAC Customs 7 items
  16. JP Enterprises Inc 1 item
  17. Midwest Industries 2 items
  18. Q, LLC 2 items
  19. Rainier Arms, LLC 2 items
  20. Rise Armament 1 item
  21. Samson Manufacturing Corp. 1 item
  22. Sharps Bros 2 items
  23. Stern Defense 1 item
  24. True North Concepts 1 item
Model
  1. Sig MCX 1 item
Mount
  1. M-LOK 10 items
  2. Other 2 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
Price
  1. $0.00 - $999.99 49 items
  2. $1,000.00 and above 2 items
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 Complete Upper Receiver 2 items
  7. AR-15 Handguard 5 items
  8. AR-15 Stripped Lower Receiver 1 item
  9. AR-15 Stripped Upper Receiver 3 items
  10. Brace 1 item
  11. Buffer Tube 2 items
  12. Cable Clip 1 item
  13. Charging Handle 1 item
  14. Chassis 2 items
  15. Compensator 2 items
  16. Dust Cover 1 item
  17. End Cap 1 item
  18. Forearm Accesory 1 item
  19. Handguard 4 items
  20. Handstop 1 item
  21. Lower Parts Kit 1 item
  22. Magazine Release 1 item
  23. Pistol Grip 7 items
  24. Safety Selector 1 item
  25. Stock 2 items
  26. Stock Accessory 1 item
  27. Stock Adapter 3 items
  28. Trigger 1 item
  29. Vertical Grip 3 items
Rail Length
  1. 6.25" 2 items
  2. 6.7" 3 items
  3. 7" 1 item
  4. 8" 1 item
  5. 9.5" 1 item
  6. 9.6" 3 items
  7. 10" 4 items
  8. 10.5" 2 items
  9. 11.8" 3 items
  10. 12.4" 1 item
  11. 12.5" 2 items
  12. 13" 2 items
  13. 13.5" 1 item
  14. 13.8" 3 items
  15. 15" 2 items
  16. 15.3" 3 items
Thread Pitch
  1. .578x28 1 item
  2. 1/2x28 (9mm) 1 item
Twist Rate
  1. 1:7 1 item
Stock Status
  1. In stock 49 items Remove This Item
  2. Out of stock 2 items
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