Pursue Your Passion
My Cart

Discord

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.

Dark mode is

View as Grid List

Items 1-16 of 39

Page
per page
  11. Maxim Defense MDX 508 7.62x39 Mil-Spec Complete Upper - 8.5"
    Maxim Defense MDX 508 7.62x39 Mil-Spec Complete Upper - 8.5"
    As low as $1,255.50
    Add to Wish List Add to Compare
  12. Maxim Defense MDX 510 5.56 NATO Mil-Spec Complete Upper - 10.3"
    Maxim Defense MDX 510 5.56 NATO Mil-Spec Complete Upper - 10.3"
    As low as $1,255.50
    Add to Wish List Add to Compare
View as Grid List

Items 1-16 of 39

Page
per page
Shop By
Now Shopping by
  1. Product Type AR-15 Complete Upper Receiver Remove This Item
  2. Price $1,000.00 - $1,999.99 Remove This Item
Clear All
Shopping Options
Barrel Length
  1. 5.5" 3 items
  2. 7.75" 1 item
  3. 7.94" 1 item
  4. 8" 1 item
  5. 8.5" 4 items
  6. 9.5" 1 item
  7. 9.75" 1 item
  8. 10.3" 5 items
  9. 10.5" 3 items
  10. 11.5" 1 item
  11. 11.85" 2 items
  12. 13" 2 items
  13. 13.7" 1 item
  14. 13.9" 1 item
  15. 14.5" 3 items
  16. 16" 7 items
  17. 16.1" 1 item
  18. 18" 2 items
Barrel Profile
  1. Non-fluted 1 item
Caliber
  1. .223/5.56 1 item
  2. .223 Wylde 3 items
  3. 300 Blackout 8 items
  4. 5.56 NATO 15 items
  5. 7.62x39 2 items
Color
Configuration
  1. Mil-Spec 1 item
Finish
  1. Arid 1 item
  2. Anodize 4 items
Gas Block Diameter
  1. .750" 8 items
Gas Length
  1. Pistol 3 items
  2. Carbine 3 items
  3. Mid 7 items
Is Firearms?
  1. No 39 items
Manufacturer
  1. Blackout Defense 1 item
  2. Daniel Defense 6 items
  3. Maxim Defense 7 items
  4. Noveske 8 items
  5. Primary Weapon Systems 9 items
  6. Q, LLC 2 items
  7. Rainier Arms, LLC 4 items
  8. Sig Sauer 1 item
  9. VKTR Industries 1 item
Model
  1. Sig MCX 1 item
Mount
  1. M-LOK 8 items
  2. Picatinny 2 items
Option
  1. AR-15 5 items
Platform
  1. AR-15 3 items
  2. Sig Sauer 1 item
Price
  1. $1,000.00 - $1,099.99 3 items
  2. $1,100.00 - $1,199.99 7 items
  3. $1,200.00 - $1,299.99 12 items
  4. $1,300.00 - $1,399.99 2 items
  5. $1,400.00 - $1,499.99 9 items
  6. $1,500.00 - $1,599.99 4 items
  7. $1,700.00 - $1,799.99 1 item
  8. $1,800.00 and above 1 item
Rail Length
  1. 6.91" 1 item
  2. 7" 3 items
  3. 8.5" 1 item
  4. 9.5" 3 items
  5. 10.5" 1 item
  6. 11" 1 item
  7. 12" 1 item
  8. 12.5" 2 items
  9. 15" 4 items
Thread Pitch
  1. 1/2x28 12 items
  2. 5/8x24 1 item
Threaded
  1. Yes 4 items
Twist Rate
  1. 1:6 1 item
  2. 1:7 9 items
  3. 1:8 1 item
Stock Status
  1. In stock 18 items
  2. Out of stock 21 items
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