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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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  2. Faxon Firearms Match Series 9mm Barrel for Glock 43
    Faxon Firearms Match Series 9mm Barrel for Glock 43
    $161.00 - $179.40
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  3. Faxon Firearms Match Series 9mm Threaded Barrel for Glock 43
    Faxon Firearms Match Series 9mm Threaded Barrel for Glock 43
    $175.75 - $188.60
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  4. Sig Sauer Grip Module Assembly 365XL w/ Manual Safety
    Sig Sauer Grip Module Assembly 365XL w/ Manual Safety
    $89.99
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  5. True Precision CZ P-10S X-Fluted Non-Threaded Barrel
    True Precision CZ P-10S X-Fluted Non-Threaded Barrel
    $161.49 - $180.49
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  6. Tyrant Designs I.T.T.S. Trigger For Glock Gen 3/4
    Tyrant Designs I.T.T.S. Trigger For Glock Gen 3/4
    $67.45
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  7. Mirzon Sig Sauer 320 Aluminum Base Pad
    Mirzon Sig Sauer 320 Aluminum Base Pad
    $22.99
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  8. Tyrant Designs Magwell For Glock 19 Gen 5
    Tyrant Designs Magwell For Glock 19 Gen 5
    $62.95
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  13. Rainier Arms Exclusive Danger Close Armament DCA-43 Select Match Threaded Barrel For Glock 43
    Danger Close Armament DCA-43 Select Match Threaded Barrel For Glock 43
    $209.00 - $229.00
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  14. Faxon Firearms Match Series Sig Sauer P365 9mm Barrel
    Faxon Firearms Match Series Sig Sauer P365 9mm Barrel
    $161.00 - $179.40
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  15. Tyrant Designs Magwell for Glock 17 Gen 3
    Tyrant Designs Magwell for Glock 17 Gen 3
    $62.95
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  16. Faxon Firearms Match Series Sig Sauer P365XL 9mm Barrel
    Faxon Firearms Match Series Sig Sauer P365XL 9mm Barrel
    $161.00 - $179.40
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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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  9. $900.00 and above 1 item
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  1. Accessory 4 items
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  4. Backplate 2 items
  5. Barrel 117 items
  6. Basepad 10 items
  7. Bipod Mount 1 item
  8. Bolt Catch 1 item
  9. Charging Handle 3 items
  10. Compensator 35 items
  11. Connector 1 item
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  15. Flashlight Accessory 1 item
  16. Grip Accessory 9 items
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  18. Guide Rod 30 items
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  25. Magazine 5 items
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  27. Magazine Catch 3 items
  28. Magazine Extension 4 items
  29. Magazine Release 15 items
  30. Magwell 36 items
  31. Optic Plate 5 items
  32. Parts Kit 6 items
  33. Pistol Accessory 10 items
  34. Pistol Frame 27 items
  35. Pistol Grip 1 item
  36. Pistol Part 36 items
  37. Pistol Sights 9 items
  38. Rear Sight 1 item
  39. Recoil Spring 46 items
  40. Safety Selector 1 item
  41. Sight Post 2 items
  42. Sled Feet 1 item
  43. Slide 71 items
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  46. Spring 6 items
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  9. Full 4 items
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  1. 1/2x28 44 items
  2. M13.5x1 LH 1 item
Threaded
  1. Yes 20 items
  2. No 32 items
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  1. 1:9 1 item
  2. 1:10 51 items
  3. 1:16 2 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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