Pursue Your Passion
My Cart

Discord

Menu
Account

Parts

Our amazing offer consists of a great variety of AR-10, AR-15, and pistol parts and accessories. Purchase upper receivers, muzzle devices, handguards, BCG, barrels, triggers, magazine extensions, etc., and start modifying your firearm today.

Parts

Dark mode is

View as Grid List

Items 1-16 of 25

Page
per page
  2. Grayguns Sig Sauer P320 X-Series Laser-Sculpted Grip Module - Carry
    Grayguns Sig Sauer P320 X-Series Laser-Sculpted Grip Module - Carry
    $130.00 - $180.00
    Add to Wish List Add to Compare
  3. Grayguns Sig Sauer P320 X-Series Laser-Sculpted Grip Module - Compact
    Grayguns Sig Sauer P320 X-Series Laser-Sculpted Grip Module - Compact
    $130.00 - $180.00
    Add to Wish List Add to Compare
  4. True Precision Sig P320 X-Compact 3.6" Threaded Barrel
    True Precision Sig P320 X-Compact 3.6" Threaded Barrel
    $199.49 - $218.49
    Add to Wish List Add to Compare
  5. True Precision Sig P320 X-Compact 3.6" Non-Threaded Barrel
    True Precision Sig P320 X-Compact 3.6" Non-Threaded Barrel
    $180.49 - $199.49
    Add to Wish List Add to Compare
  6. Killer Innovations Velocity Sig Sauer P320 Pro Tucked Compensator
    Killer Innovations Velocity Sig Sauer P320 Pro Tucked Compensator
    $129.49
    Add to Wish List Add to Compare
  9. L2D Combat Precision Match Sig Sauer P320 Compact 9MM Barrel - Fluted
    L2D Combat Precision Match Sig Sauer P320 Compact 9MM Barrel - Fluted
    $149.99
    Add to Wish List Add to Compare
  10. Faxon Firearms Sig Sauer P320 Compact Flamed Barrel - Threaded
    Faxon Firearms Sig Sauer P320 Compact Flamed Barrel - Threaded
    $188.60 - $207.00
    Add to Wish List Add to Compare
  11. Faxon Firearms Sig Sauer P320 Compact Flamed Barrel
    Faxon Firearms Sig Sauer P320 Compact Flamed Barrel
    $179.40 - $204.25
    Add to Wish List Add to Compare
  12. Mirzon Sig Sauer P320 Enhanced Grip Module Gen 2
    Mirzon Sig Sauer P320 Enhanced Grip Module Gen 2
    $109.00
    Add to Wish List Add to Compare
  13. True Precision Sig P320 Compact 3.9" Non-Threaded Barrel
    True Precision Sig P320 Compact 3.9" Non-Threaded Barrel
    $180.49 - $199.49
    Add to Wish List Add to Compare
  14. True Precision Sig P320 Compact 3.9" Threaded Barrel
    True Precision Sig P320 Compact 3.9" Threaded Barrel
    $199.49 - $218.49
    Add to Wish List Add to Compare
  15. Grayguns Sig Sauer P320 Competition Adjustable Trigger System
    Grayguns Sig Sauer P320 Competition Adjustable Trigger System
    $159.00 - $164.00
    Add to Wish List Add to Compare
  16. Agency Arms Sig P320 Dual Port Compensator - Black
    Agency Arms Sig P320 Dual Port Compensator - Black
    $100.00
    Out of stock
    Add to Wish List Add to Compare
View as Grid List

Items 1-16 of 25

Page
per page

Firearm parts

Rainier Arms is the best place to purchase parts and accessories for your rifle or pistol online, and all that for more than affordable prices. Look no further, you can find here everything that comes to your mind and more! The best manufacturers in the business, like Killer Innovations, Lantac, Next Level Armament, Rainier Arms LLC, Apex Tactical Specialties, and many more are here to offer you their high-quality products. Select your preferred part and make your AR-10, AR-15 or pistol a unique piece of firearm.

Shop By
Now Shopping by
  1. Model Sig P320 Remove This Item
  2. Price $100.00 - $199.99 Remove This Item
Clear All
Shopping Options
Barrel Length
  1. 3.6" 3 items
  2. 3.9" 2 items
  3. 4.6" 1 item
Caliber
  1. 9mm 8 items
Color
Configuration
  1. Flat 1 item
  2. P320 3 items
Finish
  1. DLC 1 item
  2. Nitride 2 items
  3. Titanium Nitride (TiN) 3 items
Is Firearms?
  1. No 25 items
Manufacturer
  1. Agency Arms 5 items
  2. Apex Tactical Specialties 2 items
  3. Faxon Firearms 2 items
  4. Grayguns 5 items
  5. Grey Ghost Precision 1 item
  6. Griffin Armament 1 item
  7. Killer Innovations 1 item
  8. L2D Combat 2 items
  9. Mirzon 1 item
  10. Sig Sauer 1 item
  11. True Precision 4 items
Option
  1. Sig Sauer 16 items
Platform
  1. Sig Sauer 25 items
Price
  1. $100.00 - $109.99 6 items
  2. $120.00 - $129.99 1 item
  3. $130.00 - $139.99 4 items
  4. $140.00 - $149.99 3 items
  5. $150.00 - $159.99 2 items
  6. $160.00 - $169.99 1 item
  7. $170.00 - $179.99 2 items
  8. $180.00 - $189.99 2 items
  9. $190.00 and above 4 items
Product Type
  1. Barrel 10 items
  2. Compensator 4 items
  3. Grip Module 4 items
  4. Magwell 1 item
  5. Optic Plate 1 item
  6. Pistol Frame 2 items
  7. Trigger 5 items
Size
  1. Compact 1 item
Thread Pitch
  1. 1/2x28 7 items
Threaded
  1. Yes 3 items
  2. No 4 items
Twist Rate
  1. 1:9 1 item
  2. 1:10 7 items
Stock Status
  1. In stock 15 items
  2. Out of stock 10 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.

What are the most common barrel thread patterns for pistols and rifles?

For .22LR, .22MAG, .17HMR, 9mm, and .223/5.56 NATO the most common thread pattern would be 1/2x28, with some exceptions for 9mm and .223/5.56 NATO firearms. As for .308/7.62mm and .338 Lapua Magnum, the thread pattern that is most commonly used is 5/8x24, with a few exceptions. Another typical thread pattern is 9/16x24 and it is mostly used for .40 S&W weapons.

Single triggers or two-stage triggers?

Whichever you choose, you cannot go wrong. The single trigger is fast and simple to use; as soon as you apply a small amount of pressure, the firearm goes off. Two-stage trigger is extremely accurate and you know precisely when the shot is going to be fired. The first stage prepares you for the second one, when the trigger pushes the hammer up causing the firearm to discharge. So, it is up to you to make a choice.

Google Customer Reviews Google Customer Reviews