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. Price $90.00 - $99.99 Remove This Item
Clear All
Shopping Options
Barrel Length
  1. 7.5" 1 item
  2. 8" 1 item
  3. 16" 1 item
Caliber
  1. .223/5.56 1 item
  2. .223 Rem 1 item
  3. .30 Cal 2 items
  4. .308 1 item
  5. 5.56X45 1 item
  6. 5.56 NATO 2 items
  7. 5.56mm 1 item
  8. 9mm 3 items
Category
  1. Receiver Parts 2 items
  2. Parts & Kits 2 items
  3. Barrels 2 items
  4. Buffer Systems 2 items
  5. Trigger Parts 4 items
  6. Gas Systems 1 item
  7. Muzzle Devices 29 items
  8. Grips 4 items
  9. Charging Handles 12 items
  10. Rifle Handguards 1 item
  11. Stocks & Braces 8 items
Color
Configuration
  1. Curved 1 item
  2. Flat 1 item
  3. .625 DIA 1 item
Finish
  1. Nitride 1 item
Gas Block Diameter
  1. .750" 2 items
Gas System Length
  1. Pistol 1 item
  2. Mid 1 item
Inside Diameter
  1. 1.385" 1 item
Manufacturer
  1. A3 Tactical 1 item
  2. Aero Precision 1 item
  3. Andro Corp Industries 1 item
  4. Angstadt Arms 1 item
  5. B5 Systems 1 item
  6. Bootleg 1 item
  7. Bravo Company MFG (BCM) 4 items
  8. Cross Machine Tool (CMT) 2 items
  9. F-1 Firearms 1 item
  10. Fortis MFG 3 items
  11. Forward Controls Design 9 items
  12. Griffin Armament 1 item
  13. Hiperfire 2 items
  14. James Madison Tactical (JMT) 2 items
  15. JK Armament 1 item
  16. JL Billet 1 item
  17. JMAC Customs 5 items
  18. Kinetic Development Group 1 item
  19. Mad Pig 2 items
  20. Magpul Industries 1 item
  21. NEMO Arms 1 item
  22. Next Level Armament 2 items
  23. Noveske 2 items
  24. Patriot Ordnance Factory (POF) 1 item
  25. Precision Armament 2 items
  26. Primary Weapon Systems 1 item
  27. Q, LLC 1 item
  28. Radian Weapons 5 items
  29. SB Tactical 4 items
  30. Silencerco 1 item
  31. Sons of Liberty Gun Works 3 items
  32. Tyrant Designs 1 item
  33. V Seven Weapon Systems 1 item
  34. WMD Guns 1 item
Mount
  1. KeyMod 1 item
  2. Picatinny 1 item
Option
  1. AK-47/74 1 item
  2. AR-10 3 items
  3. AR-15 11 items
  4. Non-Adjustable 1 item
Platform
  1. AR-15 5 items
Product Type
  1. AR-15 Barrel 2 items
  2. AR-15 Charging Handle 8 items
  3. AR-15 Complete Lower Receiver 1 item
  4. AR-15 Handguard 1 item
  5. AR-15 Stripped Upper Receiver 1 item
  6. Brace 4 items
  7. Buffer Kit 1 item
  8. Buffer Tube 1 item
  9. Charging Handle 5 items
  10. Compensator 13 items
  11. Flash Hider 7 items
  12. Gas Block 1 item
  13. Lower Parts Kit 1 item
  14. Muzzle Brake 9 items
  15. Pistol Grip 4 items
  16. Stock 3 items
  17. Stock Adapter 1 item
  18. Trigger 4 items
Rail Length
  1. 4" 1 item
  2. 7" 1 item
  3. 9.2" 1 item
  4. 10" 1 item
  5. 11.25" 1 item
  6. 13.5" 1 item
  7. 15" 1 item
Size
  1. X-Large 1 item
Thread Pitch
  1. 1/2x28 (9mm) 2 items
  2. 1/2x28 (.22 cal) 17 items
  3. 1/2x36 2 items
  4. 5/8x24 (.30 cal) 11 items
  5. M13.5x1 LH 1 item
  6. M14x1 LH 1 item
Threaded
  1. Yes 8 items
Twist Rate
  1. 1:7 2 items
Stock Status
  1. In stock 67 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