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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 $100.00 - $199.99 Remove This Item
  2. Option AR-15 Remove This Item
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Barrel Length
  1. 7" 1 item
  2. 18" 2 items
Caliber
  1. 5.56 NATO 2 items
Category
  1. Receiver Parts 16 items
  2. Parts & Kits 1 item
  3. Buffer Systems 2 items
  4. Muzzle Devices 1 item
  5. Bolt Parts 4 items
  6. Charging Handles 4 items
  7. Rifle Handguards 10 items
Color
Configuration
  1. AR-15 1 item
  2. M-LOK 1 item
Finish
  1. Black 1 item
  2. Carbon Fiber 1 item
  3. Phosphate 1 item
  4. Anodize 3 items
Gas System Length
  1. Pistol 1 item
  2. Intermediate 2 items
Inside Diameter
  1. 1.3" 1 item
  2. 1.315" 1 item
  3. 1.34" 1 item
  4. 1.54" 1 item
Manufacturer
  1. Aero Precision 2 items
  2. Andro Corp Industries 1 item
  3. Bravo Company MFG (BCM) 3 items
  4. Brigand Arms 1 item
  5. Centurion Arms 2 items
  6. Cross Machine Tool (CMT) 2 items
  7. F-1 Firearms 1 item
  8. Fortis MFG 3 items
  9. Forward Controls Design 4 items
  10. Griffin Armament 2 items
  11. JL Billet 1 item
  12. JP Enterprises Inc 3 items
  13. Magpul Industries 1 item
  14. Noveske 1 item
  15. Radian Weapons 2 items
  16. Rainier Arms, LLC 1 item
  17. Rainier Industries 1 item
  18. Sharps Bros 3 items
  19. Sons of Liberty Gun Works 1 item
  20. Strike Industries 1 item
  21. V Seven Weapon Systems 2 items
Mount
  1. M-LOK 8 items
  2. Picatinny 3 items
Platform
  1. AR-15 2 items
Product Type
  1. AR-15 Assembled Upper Receiver 1 item
  2. AR-15 Charging Handle 4 items
  3. AR-15 Handguard 9 items
  4. AR-15 Stripped Lower Receiver 6 items
  5. AR-15 Stripped Upper Receiver 8 items
  6. Bolt 1 item
  7. Bolt Carrier Group 3 items
  8. Buffer Spring 1 item
  9. Chassis 1 item
  10. Flash Hider 1 item
  11. Handguard 5 items
  12. Lower Parts Kit 1 item
  13. Silent Captured Spring 1 item
Rail Length
  1. 4.25" 1 item
  2. 4.5" 1 item
  3. 5.5" 1 item
  4. 6.7" 3 items
  5. 7" 2 items
  6. 7.5" 2 items
  7. 8.5" 1 item
  8. 8.6" 1 item
  9. 9" 2 items
  10. 9.5" 3 items
  11. 9.6" 2 items
  12. 10.3" 1 item
  13. 10.5" 3 items
  14. 11.5" 2 items
  15. 12" 3 items
  16. 12.3" 1 item
  17. 12.4" 2 items
  18. 12.5" 3 items
  19. 12.6" 1 item
  20. 12.8" 1 item
  21. 13.5" 2 items
  22. 13.7" 1 item
  23. 13.8" 2 items
  24. 14.3" 1 item
  25. 15" 5 items
  26. 15.3" 2 items
  27. 16.3" 1 item
Size
  1. 5 Slot 1 item
Thread Pitch
  1. 1/2x28 (.22 cal) 1 item
  2. 5/8x24 (.30 cal) 1 item
Stock Status
  1. In stock 36 items Remove This Item
  2. Out of stock 2 items
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