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.

View as Grid List

Items 1-16 of 38

Page
per page
  1. Aero Precision Low Profile Gas Block - .750 Nitride
    Aero Precision Low Profile Gas Block - .750 Nitride
    $35.99
    Out of stock
    Add to Wish List Add to Compare
  8. Rainier Arms Exclusive Spinta Precision AR-15 9mm Thermal Barrel - 5.25” Nitride (Rainier Arms Exclusive)
    Spinta Precision AR-15 9mm Thermal Barrel - 5.25” Nitride (Rainier Arms Exclusive)
    Special Price $77.99 Regular Price $149.99
    Out of stock
    Add to Wish List Add to Compare
  9. Rainier Arms Select 5.56 NATO AR-15 Barrel - 12.5"
    Rainier Arms Select 5.56 NATO AR-15 Barrel - 12.5"
    $195.00
    Out of stock
    Add to Wish List Add to Compare
  10. Rainier Arms Exclusive Spinta Precision .223 Wylde Dissipator AR-15 Barrel - 16" (Rainier Arms Exclusive)
    Spinta Precision .223 Wylde Dissipator AR-15 Barrel - 16" (Rainier Arms Exclusive)
    Special Price $149.99 Regular Price $199.99
    Out of stock
    Add to Wish List Add to Compare
  11. Aeroknox Butterfly Brake .223/5.56
    Aeroknox Butterfly Brake .223/5.56
    $90.00
    Out of stock
    Add to Wish List Add to Compare
  15. Faxon Firearms Big Gunner 8.6BLK AR-10/LR308 Barrel - 12"
    Faxon Firearms Big Gunner 8.6BLK AR-10/LR308 Barrel - 12"
    $219.88
    Out of stock
    Add to Wish List Add to Compare
View as Grid List

Items 1-16 of 38

Page
per page
Shop By
Now Shopping by
  1. Finish Nitride Remove This Item
Clear All
Shopping Options
Barrel Length
  1. 5.25" 1 item
  2. 7.5" 1 item
  3. 8" 1 item
  4. 8.5" 2 items
  5. 10.5" 4 items
  6. 12" 1 item
  7. 12.5" 1 item
  8. 13.7" 1 item
  9. 13.9" 1 item
  10. 16" 10 items
  11. 16.1" 1 item
  12. 18" 2 items
  13. 20" 3 items
Barrel Profile
  1. Dissipator 2 items
  2. MK12 SPR 1 item
Caliber
  1. .223/5.56 2 items
  2. .223 Wylde 6 items
  3. .308 1 item
  4. .308 Win 2 items
  5. .458 Socom 1 item
  6. 300 Blackout 2 items
  7. 5.56 NATO 9 items
  8. 6.5 Creedmoor 1 item
  9. 8.6 Blackout 4 items
  10. 9mm 5 items
Category
  1. Barrels 29 items
  2. Trigger Parts 2 items
  3. Gas Systems 1 item
  4. Muzzle Devices 4 items
  5. Bolt Parts 1 item
  6. Charging Handles 1 item
Color
Gas Block Diameter
  1. .625" 3 items
  2. .750" 17 items
  3. .875" 2 items
Gas System Length
  1. Blowback 5 items
  2. Pistol 3 items
  3. Carbine 3 items
  4. Mid 4 items
  5. Intermediate 1 item
  6. Rifle 7 items
Manufacturer
  1. Aero Precision 1 item
  2. Aeroknox 1 item
  3. Ballistic Advantage 1 item
  4. Battle Arms Development 1 item
  5. Faxon Firearms 15 items
  6. Fortis MFG 1 item
  7. JMAC Customs 1 item
  8. Kinetic Development Group 1 item
  9. Rainier Arms, LLC 10 items
  10. Spinta Precision 2 items
  11. Taran Tactical Innovations 1 item
  12. VKTR Industries 3 items
Option
  1. AR-15 1 item
  2. Non-Adjustable 1 item
Platform
  1. AR-10/LR308 4 items
  2. AR-15 24 items
  3. Remington 700 1 item
  4. Savage Small Shank 2 items
Price
  1. $0.00 - $99.99 6 items
  2. $100.00 - $199.99 13 items
  3. $200.00 - $299.99 11 items
  4. $300.00 - $399.99 6 items
  5. $400.00 and above 2 items
Product Type
  1. AR-10/LR308 Barrel 4 items
  2. AR-15 Barrel 22 items
  3. Bolt-Action Barrel 3 items
  4. Bolt Carrier Group 1 item
  5. Charging Handle 1 item
  6. Compensator 1 item
  7. Gas Block 1 item
  8. Muzzle Brake 3 items
  9. Trigger 2 items
Thread Pitch
  1. 1/2x28 (9mm) 4 items
  2. 1/2x28 (.22 cal) 17 items
  3. 1/2x36 1 item
  4. 5/8x24 (.30 cal) 8 items
  5. 11/16x24 1 item
  6. M18x1.5 1 item
  7. M24x1.5 RH 1 item
Twist Rate
  1. 1:3 4 items
  2. 1:7 4 items
  3. 1:7.5 3 items
  4. 1:8 10 items
  5. 1:10 7 items
  6. 1:14 1 item
Stock Status
  1. Out of stock 38 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