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 17-32 of 151

Page
per page
  1. Killer Innovations Sig P320 X-Carry Velocity Non-Threaded Barrel
    Killer Innovations Sig P320 X-Carry Velocity Non-Threaded Barrel
    $249.00
    Add to Wish List Add to Compare
  2. Tyrant Designs Sig Sauer P320 Trigger
    Tyrant Designs Sig Sauer P320 Trigger
    $71.95
    Add to Wish List Add to Compare
  4. Killer Innovations Velocity Sig P320 Compact V2 Stripped Slide
    Killer Innovations Velocity Sig P320 Compact V2 Stripped Slide
    $454.00
    Add to Wish List Add to Compare
  5. Rainier Arms Exclusive The Gun Co. SS320 Sig P320 Compact Slide
    The Gun Co. SS320 Sig P320 Compact Slide
    $390.00 - $479.00
    Add to Wish List Add to Compare
  8. Killer Innovations Sig P320 X-Compact Velocity Threaded Barrel
    Killer Innovations Sig P320 X-Compact Velocity Threaded Barrel
    $268.00
    Add to Wish List Add to Compare
  9. 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
  10. 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
  11. 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
  12. 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
  16. 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
View as Grid List

Items 17-32 of 151

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
Clear All
Shopping Options
Barrel Length
  1. 3.54" 1 item
  2. 3.6" 3 items
  3. 3.86" 1 item
  4. 3.9" 8 items
  5. 4.57" 1 item
  6. 4.6" 1 item
  7. 5" 1 item
Barrel Profile
  1. SDM 1 item
Caliber
  1. 9mm 22 items
Color
Configuration
  1. Flat 1 item
  2. Right Hand 1 item
  3. P320 12 items
Finish
  1. Black/Black 1 item
  2. Black DLC 1 item
  3. Black/Nickel 1 item
  4. Black/TiN 1 item
  5. DLC 15 items
  6. Nitride 4 items
  7. Anodize 1 item
  8. PVD/CVD 1 item
  9. Quench Polish Quench (QPQ) 1 item
  10. Titanium Nitride (TiN) 9 items
  11. Molecular Dense Coating (MDC) 3 items
Is Firearms?
  1. No 151 items
Manufacturer
  1. Agency Arms 15 items
  2. Align Tactical 3 items
  3. Apex Tactical Specialties 6 items
  4. ARC Division 1 item
  5. Brügger & Thomet (B&T) 1 item
  6. CAA 1 item
  7. Danger Close Armament 7 items
  8. DPM Systems Technologies 7 items
  9. Empire 3 items
  10. Faxon Firearms 4 items
  11. Forward Controls Design 1 item
  12. GoGun USA 1 item
  13. Grayguns 11 items
  14. Grey Ghost Precision 1 item
  15. Griffin Armament 1 item
  16. Killer Innovations 10 items
  17. L2D Combat 2 items
  18. Mirzon 3 items
  19. Mischief Machine 3 items
  20. NIGHT FISION 1 item
  21. Norsso 11 items
  22. Obsidian Arms 2 items
  23. Rainier Arms, LLC 2 items
  24. Shalotek 4 items
  25. Sharps Bros 2 items
  26. Sig Mechanics 1 item
  27. Sig Sauer 26 items
  28. Springer Precision 3 items
  29. Tactical Development 1 item
  30. The Gun Co. 1 item
  31. Trinity Nevada 1 item
  32. True Precision 5 items
  33. Tyrant Designs 8 items
  34. Wilson Combat 1 item
Optic Footprint
  1. Trijicon RMR 4 items
Option
  1. V2 1 item
  2. Safety 1 item
  3. No Safety 1 item
  4. Glock 1 item
  5. Sig Sauer 61 items
Platform
  1. Glock 1 item
  2. Sig Sauer 141 items
Price
  1. $0.00 - $999.99 150 items
  2. $1,000.00 and above 1 item
Product Type
  1. BackPack 1 item
  2. Backplate 1 item
  3. Barrel 24 items
  4. Basepad 2 items
  5. Charging Handle 1 item
  6. Compensator 7 items
  7. Failure Resistant Extractor 1 item
  8. Fire Control Unit 1 item
  9. Grip Module 21 items
  10. Guide Rod 8 items
  11. Handgun Sights 1 item
  12. Magazine Release 4 items
  13. Magwell 9 items
  14. Optic Plate 3 items
  15. Parts Kit 2 items
  16. Pistol Accessory 1 item
  17. Pistol Frame 12 items
  18. Pistol Part 4 items
  19. Pistol Sights 3 items
  20. Recoil Spring 6 items
  21. Sled Feet 1 item
  22. Slide 26 items
  23. Slide Parts Kit 2 items
  24. Spring 1 item
  25. Stabilizer Kit 1 item
  26. Take Down / Pivot Pins 1 item
  27. Trigger 11 items
Size
  1. Small 2 items
  2. Medium 1 item
  3. Large 2 items
  4. X-Compact 6 items
  5. Sub-Compact 1 item
  6. Compact 6 items
  7. Carry 1 item
  8. Full 4 items
Thread Pitch
  1. 1/2x28 12 items
Threaded
  1. Yes 7 items
  2. No 10 items
Twist Rate
  1. 1:9 1 item
  2. 1:10 16 items
Stock Status
  1. In stock 101 items
  2. Out of stock 50 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