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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

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  1. True Precision SIG Sauer P365XL X-Fluted Match Grade Barrel Threaded 1/2X28
    True Precision SIG Sauer P365XL X-Fluted Match Grade Barrel Threaded 1/2X28
    $170.99 - $189.99
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  3. Killer Innovations CZ P10-C Non-Threaded Velocity Barrel
    Killer Innovations CZ P10-C Non-Threaded Velocity Barrel
    $249.00
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  4. True Precision Sig Sauer P365XL X-Fluted Match Grade Barrel
    True Precision Sig Sauer P365XL X-Fluted Match Grade Barrel
    $161.49 - $180.49
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  6. Killer Innovations Sig P320C Velocity Threaded Barrel
    Killer Innovations Sig P320C Velocity Threaded Barrel
    $268.00
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  7. Killer Innovations Sig P320C Velocity Non-Threaded Barrel
    Killer Innovations Sig P320C Velocity Non-Threaded Barrel
    $249.00
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  8. Agency Arms Sig P320 Compact Mid Line Barrel
    Agency Arms Sig P320 Compact Mid Line Barrel
    $200.00
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  9. Killer Innovations Sig P365ST Velocity Threaded Barrel
    Killer Innovations Sig P365ST Velocity Threaded Barrel
    $249.00
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  10. Killer Innovations Sig P365ST Velocity Non-Threaded Barrel
    Killer Innovations Sig P365ST Velocity Non-Threaded Barrel
    $242.00
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  12. True Precision Springfield Hellcat PRO Threaded Barrel
    True Precision Springfield Hellcat PRO Threaded Barrel
    $170.99 - $189.99
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  13. True Precision Springfield Hellcat PRO Non-Threaded Barrel
    True Precision Springfield Hellcat PRO Non-Threaded Barrel
    $161.49 - $180.49
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  15. True Precision Sig Sauer P365 X-Fluted Match Grade Barrel
    True Precision Sig Sauer P365 X-Fluted Match Grade Barrel
    $161.49 - $180.49
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  16. True Precision Sig Sauer P365 X-Fluted Match Grade Barrel Threaded 1/2X28
    True Precision Sig Sauer P365 X-Fluted Match Grade Barrel Threaded 1/2X28
    $170.99 - $189.99
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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.

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  1. Product Type Barrel Remove This Item
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Barrel Length
  1. 3.1" 2 items
  2. 3.25" 1 item
  3. 3.5" 1 item
  4. 3.54" 1 item
  5. 3.6" 3 items
  6. 3.66" 1 item
  7. 3.7" 4 items
  8. 3.86" 1 item
  9. 3.9" 9 items
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  11. 4.02" 2 items
  12. 4.37" 1 item
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  14. 4.46" 1 item
  15. 4.5" 1 item
  16. 4.57" 2 items
  17. 4.6" 2 items
  18. 5" 1 item
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  1. Non-fluted 1 item
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  1. 9mm 102 items
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  1. Gen 3 1 item
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  5. G17 9 items
  6. G19 15 items
  7. G26 2 items
  8. G43 7 items
  9. P320 5 items
  10. P365 3 items
  11. P365XL 2 items
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  14. Titanium Nitride (TiN) 44 items
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  12. Killer Innovations 25 items
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  14. Lantac 6 items
  15. Lone Wolf Arms 2 items
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  18. Shalotek 3 items
  19. Spinta Precision 1 item
  20. Strike Industries 2 items
  21. True Precision 20 items
  22. Tyrant Designs 3 items
  23. Zaffiri Precision 2 items
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  1. CZ P-10 4 items
  2. FNH 509 2 items
  3. Glock 17 26 items
  4. Glock 19 37 items
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  6. Glock 23 1 item
  7. Glock 26 6 items
  8. Glock 34 1 item
  9. Glock 43 11 items
  10. Glock 45 1 item
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  13. Sig P320 24 items
  14. Sig P365 9 items
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  17. Springfield Hellcat 4 items
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  1. $0.00 - $99.99 7 items
  2. $100.00 - $199.99 82 items
  3. $200.00 - $299.99 48 items
  4. $300.00 and above 9 items
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  1. X-Compact 1 item
  2. Compact 1 item
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  1. 1/2x28 38 items
Threaded
  1. Yes 24 items
  2. No 32 items
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  1. 1:9 1 item
  2. 1:10 56 items
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  1. In stock 117 items
  2. Out of stock 29 items
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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.

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