Pursue Your Passion
My Cart

Rainier Arms on Instagram

Menu
Account
raineirarms

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. Thread Pitch 1/2x28 (.22 cal) Remove This Item
  2. Caliber 5.56 NATO Remove This Item
  3. Price $0.00 - $999.99 Remove This Item
Clear All
Shopping Options
Barrel Length
  1. 6.75" 1 item
  2. 7.5" 2 items
  3. 8" 1 item
  4. 10.3" 4 items
  5. 10.5" 14 items
  6. 11.5" 6 items
  7. 12.3" 1 item
  8. 12.5" 8 items
  9. 13.7" 5 items
  10. 13.9" 2 items
  11. 14.5" 13 items
  12. 16" 16 items
  13. 16.1" 2 items
  14. 16.3" 1 item
  15. 18" 2 items
  16. 20" 1 item
Barrel Profile
  1. Lightweight 4 items
  2. M16A1 1 item
  3. Non-fluted 1 item
Category
  1. Receiver Parts 14 items
  2. Barrels 59 items
  3. Muzzle Devices 8 items
Color
Finish
  1. Black 1 item
  2. DLC 1 item
  3. Nitride 20 items
  4. Satin 2 items
Gas Block Diameter
  1. .625" 10 items
  2. .750" 53 items
Gas System Length
  1. Pistol 3 items
  2. Carbine 23 items
  3. Mid 38 items
  4. Rifle 3 items
Inside Diameter
  1. 1.3" 1 item
Manufacturer
  1. Aero Precision 1 item
  2. Andro Corp Industries 2 items
  3. Ballistic Advantage 6 items
  4. Bootleg 1 item
  5. Bravo Company MFG (BCM) 1 item
  6. Centurion Arms 1 item
  7. Daniel Defense 2 items
  8. Dead Air Armament 1 item
  9. Faxon Firearms 11 items
  10. Fortis MFG 1 item
  11. Geissele 4 items
  12. Heresy Design 2 items
  13. Icon Defense 2 items
  14. JMAC Customs 1 item
  15. NEMO Arms 1 item
  16. Noveske 10 items
  17. Rainier Arms, LLC 17 items
  18. Sons of Liberty Gun Works 14 items
  19. Spinta Precision 1 item
  20. Surefire 1 item
  21. Tactical Edge Arms 1 item
Mount
  1. M-LOK 4 items
  2. Picatinny 1 item
Option
  1. AR-15 2 items
Platform
  1. AR-15 62 items
  2. Steyr Aug 2 items
Product Type
  1. AR-15 Barrel 57 items
  2. AR-15 Complete Upper Receiver 3 items
  3. AR-15 Partial Upper Receiver 10 items
  4. AR-15 Handguard 1 item
  5. Compensator 1 item
  6. Flash Hider 3 items
  7. Muzzle Brake 4 items
  8. Steyr Aug Barrel 2 items
Rail Length
  1. 9" 1 item
  2. 9.2" 1 item
  3. 9.5" 1 item
  4. 9.55" 2 items
  5. 10.5" 1 item
  6. 10.7" 1 item
  7. 11" 1 item
  8. 11.7" 1 item
  9. 12" 1 item
  10. 12.5" 1 item
  11. 13.7" 1 item
  12. 15" 5 items
Threaded
  1. Yes 8 items
Twist Rate
  1. 1:7 50 items
  2. 1:8 16 items
Stock Status
  1. In stock 81 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