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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. Apex Tactical Specialties 9mm Threaded Barrel for FN 509 Compact - 3.7"
    Apex Tactical Specialties 9mm Threaded Barrel for FN 509 Compact - 3.7"
    $213.75
    Out of stock
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  2. Killer Innovations Sig P320 X-Carry Velocity Threaded Barrel
    Killer Innovations Sig P320 X-Carry Velocity Threaded Barrel
    Out of stock
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  3. L2D Combat P320 X-Compact Precision Match 9mm Barrel - 3.6"
    L2D Combat P320 X-Compact Precision Match 9mm Barrel - 3.6"
    Out of stock
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  4. Rainier Arms Exclusive Danger Close Armament DCA-320 Select Match 9mm Barrel For Sig P320 - (3.9")
    Danger Close Armament DCA-320 Select Match 9mm Barrel For Sig P320 - (3.9")
    Out of stock
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  5. Rainier Arms Exclusive Danger Close Armament DCA-365 Select Match 9mm Threaded Barrel For Sig P365 - (3.1")
    Danger Close Armament DCA-365 Select Match 9mm Threaded Barrel For Sig P365 - (3.1")
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  6. Rainier Arms Exclusive Danger Close Armament DCA-365 Select Match 9mm Barrel For Sig P365 - (3.1")
    Danger Close Armament DCA-365 Select Match 9mm Barrel For Sig P365 - (3.1")
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  7. Rainier Arms Exclusive Danger Close Armament DCA-X5 Select Match 9mm Barrel For Sig P320 X-Five - (5")
    Danger Close Armament DCA-X5 Select Match 9mm Barrel For Sig P320 X-Five - (5")
    Out of stock
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  8. L2D Combat Precision Match Fluted Barrel for Glock 34 Gen 3/4
    L2D Combat Precision Match Fluted Barrel for Glock 34 Gen 3/4
    Out of stock
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  9. L2D Combat Precision Match Fluted Threaded Barrel For Glock 17 Gen 5
    L2D Combat Precision Match Fluted Threaded Barrel For Glock 17 Gen 5
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  10. Griffin Armament Smith and Wesson M&P Shield Threaded Barrel W/ Micro Carry Comp
    Griffin Armament Smith and Wesson M&P Shield Threaded Barrel W/ Micro Carry Comp
    $186.00
    Out of stock
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  11. Shalotek Sig Sauer P365XL LCI Barrel - Black Nitride
    Shalotek Sig Sauer P365XL LCI Barrel - Black Nitride
    $99.00
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  12. L2D Combat Precision Match Fluted Threaded Barrel For Glock 17
    L2D Combat Precision Match Fluted Threaded Barrel For Glock 17
    Out of stock
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  13. L2D Combat Precision Match Fluted Threaded Barrel For Glock 19
    L2D Combat Precision Match Fluted Threaded Barrel For Glock 19
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  14. L2D Combat Precision Match S&W M&P Shield 9MM Barrel - Fluted Bronze
    L2D Combat Precision Match S&W M&P Shield 9MM Barrel - Fluted Bronze
    $171.00
    Out of stock
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  15. Rainier Arms Exclusive Danger Close Armament DCA-48 Select Match Threaded Barrel For Glock 48 - TiN
    Danger Close Armament DCA-48 Select Match Threaded Barrel For Glock 48 - TiN
    $206.99
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  16. Griffin Armament ATM Threaded Barrel For Glock 43 w/ Micro Carry Comp
    Griffin Armament ATM Threaded Barrel For Glock 43 w/ Micro Carry Comp
    $186.00
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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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Barrel Length
  1. 3.6" 1 item
  2. 3.7" 2 items
  3. 3.9" 1 item
  4. 4" 1 item
  5. 4.57" 1 item
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  1. 9mm 14 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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