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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. Price $60.00 - $69.99 Remove This Item
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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. 6.5 Grendel 1 item
  5. 7.62mm 1 item
  6. 9mm 2 items
Category
  1. Receiver Parts 3 items
  2. Parts & Kits 13 items
  3. Barrels 1 item
  4. Buffer Systems 1 item
  5. Trigger Parts 3 items
  6. Gas Systems 2 items
  7. Muzzle Devices 13 items
  8. Bolt Parts 1 item
  9. Grips 5 items
  10. Charging Handles 3 items
  11. Rifle Handguards 1 item
  12. Stocks & Braces 6 items
Color
Configuration
  1. AR-15 1 item
  2. .750 DIA 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. Arms Republic 1 item
  6. Ascalon Arms 1 item
  7. Black River MFG 1 item
  8. Blitzkrieg Components 1 item
  9. Bravo Company MFG (BCM) 2 items
  10. Daniel Defense 1 item
  11. Faxon Firearms 1 item
  12. Fortis MFG 3 items
  13. Forward Controls Design 6 items
  14. Half Cocked Arms (HCA) 1 item
  15. HB Industries 1 item
  16. Heresy Design 1 item
  17. Icarus Precision 2 items
  18. JK Armament 1 item
  19. JL Billet 1 item
  20. Kaw Valley Precision 1 item
  21. Krebs Customs 3 items
  22. Magpul Industries 4 items
  23. Mission First Tactical 1 item
  24. Next Level Armament 5 items
  25. Rainier Arms, LLC 2 items
  26. Rainier Industries 2 items
  27. Sig Sauer 1 item
  28. Sons of Liberty Gun Works 1 item
  29. Triggertech 1 item
  30. Tyrant Designs 2 items
  31. 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 5 items
  4. 9mm 1 item
  5. CZ 1 item
  6. Springfield 1 item
  7. Non-Adjustable 1 item
  8. 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. Bolt 1 item
  7. Buffer Kit 1 item
  8. Charging Handle 1 item
  9. Compensator 4 items
  10. Dust Cover 1 item
  11. End Cap 1 item
  12. End Plate 1 item
  13. Failure Resistant Extractor 1 item
  14. Flash Hider 4 items
  15. Forearm Accesory 1 item
  16. Gas Block 2 items
  17. Lower Parts Kit 1 item
  18. Magazine Release 3 items
  19. Magwell 1 item
  20. Muzzle Brake 5 items
  21. Safety Selector 5 items
  22. Sight Post 1 item
  23. Stock 5 items
  24. Trigger 3 items
  25. 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 53 items Remove This Item
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