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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 $0.00 - $99.99 Remove This Item
  2. Option AR-15 Remove This Item
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Barrel Length
  1. 16" 8 items
  2. 18" 2 items
Caliber
  1. .223/5.56 2 items
  2. .308 1 item
  3. 300 Blackout 1 item
  4. 5.56 NATO 1 item
  5. 7.62x51 2 items
Category
  1. Receiver Parts 5 items
  2. Parts & Kits 12 items
  3. Buffer Systems 3 items
  4. Trigger Parts 2 items
  5. Gas Systems 1 item
  6. Muzzle Devices 3 items
  7. Bolt Parts 1 item
  8. Grips 2 items
  9. Charging Handles 5 items
  10. Rifle Handguards 1 item
  11. Stocks & Braces 2 items
Color
Configuration
  1. AR-15 3 items
  2. M-LOK 4 items
Finish
  1. Black 1 item
  2. Nitride 1 item
  3. Anodize 3 items
Gas System Length
  1. Pistol 2 items
  2. Mid 6 items
  3. Intermediate 2 items
Height
  1. Absolute Co-Witness 1 item
Manufacturer
  1. Aero Precision 3 items
  2. Aeroknox 2 items
  3. Armaspec 1 item
  4. Ballistic Advantage 3 items
  5. Battle Arms Development 2 items
  6. Blitzkrieg Components 1 item
  7. Bravo Company MFG (BCM) 1 item
  8. Elftmann Tactical 1 item
  9. Faxon Firearms 1 item
  10. HERA ARMS 2 items
  11. James Madison Tactical (JMT) 1 item
  12. Knight’s Armament Company (KAC) 1 item
  13. KNS Precision 1 item
  14. Magpul Industries 1 item
  15. NEMO Arms 1 item
  16. Noveske 1 item
  17. Patriot Ordnance Factory (POF) 1 item
  18. Precision Armament 1 item
  19. Rainier Industries 1 item
  20. Sionics Weapon Systems 1 item
  21. Stag Arms 1 item
  22. Troy Industries 1 item
  23. Tyrant Designs 1 item
  24. V Seven Weapon Systems 1 item
  25. VLTOR 4 items
  26. WMD Guns 1 item
Mount
  1. KeyMod 6 items
  2. Picatinny 4 items
Product Type
  1. Anti Walk Pins 2 items
  2. AR-15 Assembled Upper Receiver 1 item
  3. AR-15 Charging Handle 4 items
  4. AR-15 Stripped Lower Receiver 2 items
  5. AR-15 Stripped Upper Receiver 2 items
  6. Bolt Catch 1 item
  7. Buffer Kit 1 item
  8. Buffer Tube 2 items
  9. Cam Pin 1 item
  10. Charging Handle 1 item
  11. Compensator 1 item
  12. End Plate 1 item
  13. Flash Hider 1 item
  14. Forearm Accesory 1 item
  15. Grip Module 1 item
  16. Lower Parts Kit 3 items
  17. Muzzle Brake 1 item
  18. Patch 1 item
  19. Safety Selector 2 items
  20. Sight Post 1 item
  21. Stock Adapter 1 item
  22. Take Down / Pivot Pins 2 items
  23. Trigger Guard 1 item
  24. Upper Parts Kit 1 item
Rail Length
  1. 10" 6 items
  2. 12" 4 items
Size
  1. 9 Slot 9 items
Thread Pitch
  1. 1/2x28 (.22 cal) 2 items
  2. 5/8x24 (.30 cal) 1 item
Stock Status
  1. Out of stock 38 items Remove This Item
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