To See Our Holiday 2024 Schedule, Please Visit Our Contact Page.

Pursue Your Passion
My Cart

Rainier Arms on Instagram

Menu
Account

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.

We can't find products matching the selection.
Shop By
Now Shopping by
  1. Finish Anodize Remove This Item
Clear All
Shopping Options
Barrel Length
  1. 8" 1 item
  2. 11.5" 1 item
Caliber
  1. .30 Cal 1 item
  2. 300 Blackout 1 item
  3. 5.56 NATO 1 item
Category
  1. Receiver Parts 11 items
  2. Parts & Kits 5 items
  3. Buffer Systems 2 items
  4. Muzzle Devices 2 items
  5. Grips 11 items
  6. Charging Handles 2 items
  7. Rifle Handguards 9 items
  8. Stocks & Braces 7 items
Color
Configuration
  1. Right Hand 1 item
Gas Block Diameter
  1. .750" 1 item
Gas System Length
  1. Pistol 1 item
Inside Diameter
  1. 1.3" 1 item
  2. 1.34" 2 items
  3. 1.39" 1 item
Manufacturer
  1. A3 Tactical 2 items
  2. Aero Precision 1 item
  3. Agency Arms 1 item
  4. Arms Republic 2 items
  5. Ballistic Advantage 1 item
  6. Daniel Defense 1 item
  7. Faxon Firearms 1 item
  8. Fortis MFG 13 items
  9. Forward Controls Design 1 item
  10. Geissele 1 item
  11. Grey Birch MFG 2 items
  12. Icon Defense 2 items
  13. JK Armament 1 item
  14. JMAC Customs 7 items
  15. JP Enterprises Inc 1 item
  16. Midwest Industries 2 items
  17. Q, LLC 3 items
  18. Rainier Arms, LLC 2 items
  19. Samson Manufacturing Corp. 1 item
  20. Sharps Bros 2 items
  21. Stern Defense 1 item
  22. True North Concepts 1 item
Model
  1. Sig MCX 1 item
Mount
  1. M-LOK 10 items
  2. Other 3 items
  3. Picatinny 2 items
Option
  1. AR-10 1 item
  2. AR-15 7 items
  3. B&T APC 1 item
Platform
  1. 10-22 1 item
  2. AR-10/LR308 1 item
  3. AR-15 2 items
  4. AK47/74 2 items
  5. CZ 1 item
  6. Sig Sauer 1 item
Product Type
  1. 10/22 Receiver 1 item
  2. AR-10 Receiver Set 1 item
  3. AR-10 Stripped Lower Receiver 1 item
  4. AR-15 Charging Handle 1 item
  5. AR-15 Complete Lower Receiver 1 item
  6. AR-15 Complete Upper Receiver 2 items
  7. AR-15 Handguard 4 items
  8. AR-15 Stripped Lower Receiver 1 item
  9. AR-15 Stripped Upper Receiver 2 items
  10. Brace 1 item
  11. Buffer Tube 2 items
  12. Cable Clip 1 item
  13. Charging Handle 1 item
  14. Chassis 2 items
  15. Compensator 2 items
  16. Dust Cover 1 item
  17. End Cap 1 item
  18. Forearm Accesory 1 item
  19. Handguard 4 items
  20. Handstop 2 items
  21. Lower Parts Kit 1 item
  22. Magazine Release 1 item
  23. Pistol Grip 7 items
  24. Safety Selector 1 item
  25. Stock 2 items
  26. Stock Accessory 1 item
  27. Stock Adapter 3 items
  28. Vertical Grip 3 items
Rail Length
  1. 6.25" 2 items
  2. 6.7" 3 items
  3. 7" 1 item
  4. 8" 1 item
  5. 9.5" 1 item
  6. 9.6" 3 items
  7. 10" 4 items
  8. 10.5" 2 items
  9. 11.8" 3 items
  10. 12.4" 1 item
  11. 12.5" 2 items
  12. 13" 2 items
  13. 13.5" 1 item
  14. 13.8" 3 items
  15. 15" 1 item
  16. 15.3" 3 items
Thread Pitch
  1. .578x28 1 item
  2. 1/2x28 (9mm) 1 item
Twist Rate
  1. 1:7 1 item
Stock Status
  1. In stock 49 items Remove This Item
My Wish List
Last Added Items
  1. Add to Cart
    Remove This Item
Go to Wish List
You have no items in your wish list.
Google Customer Reviews Google Customer Reviews