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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 - $999.99 Remove This Item
  2. Option AR-10 Remove This Item
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Barrel Length
  1. 16" 1 item
  2. 18" 7 items
Caliber
  1. .223/5.56 1 item
  2. .30 Cal 1 item
  3. .308 3 items
  4. 7.62x51 1 item
Category
  1. Receiver Parts 11 items
  2. Parts & Kits 4 items
  3. Buffer Systems 4 items
  4. Gas Systems 1 item
  5. Muzzle Devices 4 items
  6. Bolt Parts 6 items
  7. Charging Handles 8 items
  8. Rifle Handguards 7 items
  9. Stocks & Braces 3 items
  10. MILSPEC Parts 2 items
Color
Configuration
  1. AR-10 2 items
  2. AR-15 7 items
Finish
  1. Black 1 item
  2. FDE 1 item
  3. Nickel Boron 1 item
  4. Phosphate 1 item
  5. Anodize 1 item
Gas Block Diameter
  1. .750" 1 item
Gas System Length
  1. Mid 1 item
  2. Intermediate 7 items
Inside Diameter
  1. 1.45" 1 item
Manufacturer
  1. Aero Precision 9 items
  2. Ballistic Advantage 1 item
  3. Battle Arms Development 1 item
  4. DPM Systems Technologies 1 item
  5. Faxon Firearms 1 item
  6. Fortis MFG 2 items
  7. Forward Controls Design 2 items
  8. Geissele 1 item
  9. Griffin Armament 2 items
  10. HERA ARMS 1 item
  11. JP Enterprises Inc 5 items
  12. Lewis Machine & Tool (LMT) 1 item
  13. Magpul Industries 7 items
  14. NEMO Arms 1 item
  15. Next Level Armament 1 item
  16. Noveske 2 items
  17. Patriot Ordnance Factory (POF) 1 item
  18. Precision Armament 1 item
  19. Radian Weapons 1 item
  20. Rainier Arms, LLC 2 items
  21. V Seven Weapon Systems 3 items
  22. WMD Guns 1 item
Mount
  1. M-LOK 1 item
  2. Picatinny 8 items
Platform
  1. AR-10/LR308 2 items
Price
  1. $0.00 - $99.99 22 items
  2. $100.00 - $199.99 11 items
  3. $200.00 - $299.99 12 items
  4. $300.00 - $399.99 2 items
  5. $400.00 - $499.99 1 item
  6. $500.00 - $599.99 1 item
  7. $700.00 and above 1 item
Product Type
  1. AR-10 / LR 308 Charging Handle 4 items
  2. AR-10 Complete Lower Receiver 1 item
  3. AR-10 Complete Upper Receiver 1 item
  4. AR-10 Handguard 4 items
  5. AR-10 Receiver Set 1 item
  6. AR-10 Stripped Lower Receiver 4 items
  7. AR-10 Stripped Upper Receiver 4 items
  8. AR-15 Charging Handle 1 item
  9. Bolt 1 item
  10. Bolt Carrier Group 3 items
  11. Bolt Catch 2 items
  12. Buffer Spring 5 items
  13. Charging Handle 4 items
  14. Cheek Riser 2 items
  15. Compensator 3 items
  16. Firing Pin 1 item
  17. Flash Hider 1 item
  18. Forearm Accesory 3 items
  19. Gas Block 1 item
  20. Stock 1 item
  21. Take Down / Pivot Pins 1 item
  22. Upper Parts Kit 2 items
Rail Length
  1. 12" 7 items
  2. 14" 1 item
  3. 15" 3 items
  4. 16.5" 1 item
  5. 17" 1 item
  6. 18" 1 item
Size
  1. Small 1 item
  2. 9 Slot 6 items
Thread Pitch
  1. 1/2x28 (.22 cal) 4 items
  2. 5/8x24 (.30 cal) 4 items
Stock Status
  1. In stock 27 items
  2. Out of stock 23 items
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