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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. 18" 1 item
Category
  1. Parts & Kits 13 items
  2. Buffer Systems 2 items
  3. Trigger Parts 4 items
  4. Bolt Parts 1 item
  5. Grips 6 items
  6. Rifle Handguards 5 items
  7. Stocks & Braces 1 item
  8. MILSPEC Parts 2 items
Color
Configuration
  1. AR-15 1 item
Finish
  1. Black 1 item
  2. NiB-X 1 item
  3. Nitromet 1 item
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  1. Intermediate 1 item
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  1. Aero Precision 1 item
  2. Armaspec 1 item
  3. Arms Republic 1 item
  4. Ascalon Arms 1 item
  5. B5 Systems 1 item
  6. Battle Arms Development 5 items
  7. Bravo Company MFG (BCM) 1 item
  8. Elftmann Tactical 1 item
  9. Ergo Grips 1 item
  10. Flatline Fiber Co 1 item
  11. HERA ARMS 1 item
  12. James Madison Tactical (JMT) 1 item
  13. KNS Precision 1 item
  14. Krebs Customs 1 item
  15. Leitner-Wise 1 item
  16. Magpul Industries 3 items
  17. Obsidian Arms 1 item
  18. Patriot Ordnance Factory (POF) 1 item
  19. Reptilia Corp 1 item
  20. Rise Armament 1 item
  21. Taran Tactical Innovations 1 item
  22. TruCalibre 1 item
  23. True North Concepts 1 item
  24. V Seven Weapon Systems 2 items
  25. WMD Guns 1 item
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  1. CZ Scorpion 1 item
Mount
  1. M-LOK 6 items
  2. Picatinny 1 item
Option
  1. AR-10 2 items
  2. AR-15 4 items
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  1. AR-15 2 items
  2. CZ 1 item
Product Type
  1. Anti Walk Pins 5 items
  2. Bolt Catch 3 items
  3. Brace Strap 1 item
  4. Buffer 1 item
  5. Buffer Spring 1 item
  6. Firing Pin 1 item
  7. Forearm Accesory 4 items
  8. Grip Module 1 item
  9. Handstop 2 items
  10. Lower Parts Kit 1 item
  11. Magazine Catch 1 item
  12. Magazine Release 1 item
  13. Pistol Grip 2 items
  14. Port Door Rod 2 items
  15. Rail Panel 1 item
  16. Rail Section 1 item
  17. Retainer Pin 2 items
  18. Safety Selector 1 item
  19. Shim Set 1 item
  20. Upper Parts Kit 1 item
  21. Vertical Grip 1 item
Rail Length
  1. 12" 1 item
Size
  1. 3 Slot 1 item
  2. 5 Slot 1 item
  3. 7 Slot 1 item
  4. 9 Slot 1 item
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  1. In stock 1 item
  2. Out of stock 33 items Remove This Item
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