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 33-48 of 250

Page
per page
  1. 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
  5. 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
  7. 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
  8. 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
  9. 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
  14. Empire Katana Magwell For Sig Sauer P365 X-Macro
    Empire Katana Magwell For Sig Sauer P365 X-Macro
    $79.99
    Add to Wish List Add to Compare
View as Grid List

Items 33-48 of 250

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. Platform Sig Sauer Remove This Item
  2. Is Firearms? No Remove This Item
  3. Price $0.00 - $999.99 Remove This Item
Clear All
Shopping Options
Barrel Length
  1. 3.1" 2 items
  2. 3.54" 1 item
  3. 3.6" 3 items
  4. 3.7" 1 item
  5. 3.86" 1 item
  6. 3.9" 8 items
  7. 4.57" 1 item
  8. 4.6" 1 item
  9. 5" 1 item
Barrel Profile
  1. SDM 1 item
Caliber
  1. 9mm 32 items
Category
  1. Pistol parts 249 items
Color
Configuration
  1. Curved 1 item
  2. Flat 1 item
  3. Right Hand 1 item
  4. Standard 1 item
  5. Straight 1 item
  6. P320 12 items
  7. P365 6 items
  8. P365XL 3 items
  9. Handgun 2 items
Finish
  1. Black/Black 2 items
  2. Black DLC 1 item
  3. Black/Nickel 2 items
  4. Black/TiN 2 items
  5. DLC 19 items
  6. MDC (Gray) 1 item
  7. Nitride 12 items
  8. Anodize 1 item
  9. PVD/CVD 3 items
  10. Quench Polish Quench (QPQ) 1 item
  11. Titanium Nitride (TiN) 13 items
  12. Molecular Dense Coating (MDC) 3 items
Magazine Capacity
  1. 6rd 1 item
  2. 7rd 1 item
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 12 items
  8. DPM Systems Technologies 16 items
  9. Empire 6 items
  10. Faxon Firearms 8 items
  11. GoGun USA 3 items
  12. Grayguns 26 items
  13. Grey Ghost Precision 1 item
  14. Griffin Armament 2 items
  15. Killer Innovations 13 items
  16. L2D Combat 2 items
  17. Midwest Industries 1 item
  18. Mirzon 3 items
  19. Mischief Machine 10 items
  20. NIGHT FISION 4 items
  21. Norsso 11 items
  22. Obsidian Arms 2 items
  23. Rainier Arms, LLC 2 items
  24. Shalotek 22 items
  25. Sharps Bros 1 item
  26. Sig Mechanics 1 item
  27. Sig Sauer 40 items
  28. Springer Precision 3 items
  29. Strike Industries 1 item
  30. Tactical Development 5 items
  31. The Gun Co. 1 item
  32. True Precision 11 items
  33. Tyrant Designs 15 items
  34. Wilson Combat 1 item
Model
  1. Glock 19 1 item
  2. Glock 23 1 item
  3. Sig P22X 4 items
  4. Sig P220 9 items
  5. Sig P226 10 items
  6. Sig P228 4 items
  7. Sig P229 6 items
  8. Sig P238 3 items
  9. Sig P320 140 items
  10. Sig P365 50 items
  11. Sig P365X 10 items
  12. Sig P365XL 29 items
  13. Sig P365 X-Macro 3 items
  14. Sig P938 3 items
  15. Sig MPX 1 item
Mount
  1. Picatinny 1 item
Optic Footprint
  1. Shield RMSc 6 items
  2. Trijicon RMR 2 items
Option
  1. V2 1 item
  2. Sig Sauer P Series 1 item
  3. Glock 2 items
  4. Sig Sauer 88 items
Price
  1. $0.00 - $99.99 110 items
  2. $100.00 - $199.99 52 items
  3. $200.00 - $299.99 36 items
  4. $300.00 - $399.99 20 items
  5. $400.00 - $499.99 22 items
  6. $500.00 - $599.99 4 items
  7. $700.00 - $799.99 2 items
  8. $800.00 and above 4 items
Product Type
  1. Accessory 4 items
  2. BackPack 1 item
  3. Backplate 1 item
  4. Barrel 39 items
  5. Basepad 4 items
  6. Compensator 8 items
  7. Extended Slide Stop 2 items
  8. Failure Resistant Extractor 1 item
  9. Fire Control Unit 2 items
  10. Grip Module 23 items
  11. Guide Rod 11 items
  12. Handgun Sights 4 items
  13. Laser 1 item
  14. Magazine 2 items
  15. Magazine Extension 1 item
  16. Magazine Release 7 items
  17. Magwell 12 items
  18. Muzzle Device Accessory 1 item
  19. Optic Plate 1 item
  20. Parts Kit 3 items
  21. Pistol Accessory 3 items
  22. Pistol Frame 22 items
  23. Pistol Grip 1 item
  24. Pistol Part 9 items
  25. Pistol Sights 3 items
  26. Recoil Spring 16 items
  27. Sled Feet 1 item
  28. Slide 50 items
  29. Slide Parts Kit 2 items
  30. Spring 1 item
  31. Stabilizer Kit 1 item
  32. Take Down / Pivot Pins 1 item
  33. Trigger 18 items
Size
  1. Small 1 item
  2. Medium 1 item
  3. Large 2 items
  4. Micro-Compact 1 item
  5. X-Compact 6 items
  6. Sub-Compact 1 item
  7. Compact 6 items
  8. Carry 1 item
  9. Full 4 items
Thread Pitch
  1. 1/2x28 15 items
Threaded
  1. Yes 8 items
  2. No 16 items
Twist Rate
  1. 1:9 1 item
  2. 1:10 19 items
Stock Status
  1. In stock 169 items
  2. Out of stock 81 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