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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. 7.62mm 1 item
  5. 9mm 2 items
Category
  1. Receiver Parts 3 items
  2. Parts & Kits 12 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. 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
  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. Fortis MFG 3 items
  12. Forward Controls Design 6 items
  13. Half Cocked Arms (HCA) 1 item
  14. HB Industries 1 item
  15. Heresy Design 1 item
  16. Icarus Precision 2 items
  17. JK Armament 1 item
  18. JL Billet 1 item
  19. Kaw Valley Precision 1 item
  20. Krebs Customs 3 items
  21. Magpul Industries 4 items
  22. Next Level Armament 5 items
  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. Tyrant Designs 2 items
  28. 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. 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 2 items
  16. Lower Parts Kit 1 item
  17. Magazine Release 3 items
  18. Magwell 1 item
  19. Muzzle Brake 5 items
  20. Safety Selector 4 items
  21. Sight Post 1 item
  22. Stock 4 items
  23. Trigger 3 items
  24. 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 50 items Remove This Item
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