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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. Manufacturer Fortis MFG Remove This Item
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Barrel Length
  1. 10.3" 1 item
Caliber
  1. 5.56 NATO 1 item
  2. 5.56mm 2 items
  3. 7.62mm 1 item
  4. 9mm 2 items
Category
  1. Receiver Parts 3 items
  2. Parts & Kits 11 items
  3. Gas Systems 2 items
  4. Muzzle Devices 7 items
  5. Bolt Parts 1 item
  6. Grips 12 items
  7. Charging Handles 4 items
  8. Rifle Handguards 7 items
Color
Configuration
  1. AR-15 1 item
  2. Right Hand 1 item
Finish
  1. Bead Blast Stainless Steel 1 item
  2. Case Hardened 1 item
  3. Nitride 1 item
  4. Phosphate 1 item
  5. Anodize 13 items
Gas Block Diameter
  1. .750" 1 item
Inside Diameter
  1. 1.34" 3 items
Model
  1. Sig MCX 1 item
Mount
  1. M-LOK 7 items
  2. Picatinny 1 item
Option
  1. AR-10 2 items
  2. AR-15 15 items
  3. 9mm 1 item
  4. Non-Adjustable 2 items
Platform
  1. AR-10/LR308 2 items
  2. AR-15 2 items
  3. Sig Sauer 1 item
Product Type
  1. Angled Grip 2 items
  2. AR-10 / LR 308 Charging Handle 1 item
  3. AR-10 Handguard 1 item
  4. AR-15 Charging Handle 2 items
  5. AR-15 Handguard 6 items
  6. AR-15 Stripped Lower Receiver 2 items
  7. AR-15 Stripped Upper Receiver 1 item
  8. Blast Shield 1 item
  9. Bolt Carrier Group 1 item
  10. Castle Nut / End Plate 2 items
  11. Charging Handle 2 items
  12. Dust Cover 2 items
  13. End Plate 1 item
  14. Gas Block 2 items
  15. Handstop 2 items
  16. Magazine Button 1 item
  17. Magazine Catch 1 item
  18. Magazine Release 1 item
  19. Muzzle Brake 5 items
  20. Muzzle Device Accessory 1 item
  21. Pistol Grip 8 items
  22. Safety Selector 2 items
  23. Take Down / Pivot Pins 1 item
Rail Length
  1. 6.7" 4 items
  2. 9.6" 5 items
  3. 11.8" 3 items
  4. 12" 1 item
  5. 12.4" 2 items
  6. 13" 1 item
  7. 13.8" 5 items
  8. 15" 1 item
  9. 15.3" 5 items
  10. 17" 1 item
Thread Pitch
  1. 1/2x28 (9mm) 1 item
  2. 1/2x28 (.22 cal) 2 items
  3. 1/2x36 2 items
  4. 5/8x24 (.30 cal) 1 item
Threaded
  1. Yes 1 item
Stock Status
  1. In stock 47 items Remove This Item
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