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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.

Parts

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  1. Rainier Arms Exclusive Nomad Defense Hybrid Frame Parts Kit for Glock Gen 4/5
    Nomad Defense Hybrid Frame Parts Kit for Glock Gen 4/5
    $85.00
    Out of stock
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  2. Sig Sauer X-RAY3 Day/Night Sights
    Sig Sauer X-RAY3 Day/Night Sights
    $99.99
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  3. 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")
    Out of stock
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  4. 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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  5. 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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  6. Apex Tactical Specialties M&P 2.0 Flat Face Forward Set Trigger Kit - Black
    Apex Tactical Specialties M&P 2.0 Flat Face Forward Set Trigger Kit - Black
    $104.50
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  7. Agency Arms Icarus Sig P320 X-Carry Grip Module - Black
    Agency Arms Icarus Sig P320 X-Carry Grip Module - Black
    $520.00
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  8. Empire Ronin Top Cover for B&T TP9 - Black
    Empire Ronin Top Cover for B&T TP9 - Black
    $324.99
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  9. Empire Katana Magwell For Sig Sauer P320 X-Series - Tano
    Empire Katana Magwell For Sig Sauer P320 X-Series - Tano
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  10. L2D Combat Precision Match Fluted Barrel for Glock 34 Gen 3/4
    L2D Combat Precision Match Fluted Barrel for Glock 34 Gen 3/4
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  11. 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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  12. L2D Combat Tyton Stripped Slide for Glock 17 - DLC Black
    L2D Combat Tyton Stripped Slide for Glock 17 - DLC Black
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  13. L2D Combat Tyton Stripped Slide For Glock 19 Gen 5 - DLC Black
    L2D Combat Tyton Stripped Slide For Glock 19 Gen 5 - DLC Black
    Special Price $314.99 Regular Price $450.00
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  14. Angstadt Arms 9mm 3-Lug Adapter - 1/2x28
    Angstadt Arms 9mm 3-Lug Adapter - 1/2x28
    $36.00
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  15. Glock OEM 9mm and .40SW Performance Trigger
    Glock OEM 9mm and .40SW Performance Trigger
    $94.99
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  16. Midwest Industries SIG Muzzle Device Collar for MPX 9mm Models
    Midwest Industries SIG Muzzle Device Collar for MPX 9mm Models
    $9.49
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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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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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