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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.

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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. Model Glock 17 Remove This Item
  2. Price $100.00 - $199.99 Remove This Item
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Barrel Length
  1. 4.4" 1 item
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  1. .45 ACP 1 item
  2. 9mm 20 items
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  1. 9mm, .40, .357 1 item
  2. .45 ACP 1 item
  3. Gen 3 2 items
  4. GEN 4/5 1 item
  5. Gen 5 5 items
  6. Glock .40 cal Gen4 1 item
  7. Glock 9mm Gen4 1 item
  8. Glock Gen 5 2 items
  9. Large Backstrap 1 item
  10. Med Backstrap 1 item
  11. No Backstrap 1 item
  12. G17 5 items
  13. G42 1 item
  14. G43 2 items
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  1. Black 1 item
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  3. DLC 2 items
  4. Gray 2 items
  5. Titanium Nitride (TiN) 5 items
  6. Molecular Dense Coating (MDC) 2 items
Manufacturer
  1. Agency Arms 11 items
  2. Apex Tactical Specialties 5 items
  3. Battle Arms Development 1 item
  4. CMC Triggers 2 items
  5. DPM Systems Technologies 2 items
  6. Faxon Firearms 2 items
  7. Grey Ghost Precision 1 item
  8. Griffin Armament 2 items
  9. Killer Innovations 4 items
  10. L2D Combat 3 items
  11. Lantac 4 items
  12. NIGHT FISION 1 item
  13. Nomad Defense 1 item
  14. Spinta Precision 1 item
  15. Timney Triggers 2 items
  16. True Precision 2 items
  17. TruGlo 1 item
  18. Zaffiri Precision 1 item
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  1. Glock 32 items
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  1. Glock 46 items
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  1. $100.00 - $109.99 11 items
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  5. $140.00 - $149.99 4 items
  6. $150.00 - $159.99 3 items
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  9. $180.00 - $189.99 2 items
  10. $190.00 and above 1 item
Product Type
  1. Compensator 7 items
  2. Guide Rod 1 item
  3. Handgun Barrel 16 items
  4. Handgun Sights 2 items
  5. Magwell 1 item
  6. Pistol Frame 1 item
  7. Pistol Part 2 items
  8. Recoil Spring 1 item
  9. Trigger 16 items
Size
  1. Full 1 item
Thread Pitch
  1. 1/2x28 (9mm) 14 items
Threaded
  1. Yes 1 item
Twist Rate
  1. 1:10 14 items
Stock Status
  1. In stock 38 items
  2. Out of stock 8 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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