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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. Brügger & Thomet (B&T) Universal Service Weapon USW for Sig Sauer P320
    Brügger & Thomet (B&T) Universal Service Weapon USW for Sig Sauer P320
    $299.00
    Out of stock
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  2. Grayguns SIG Sauer P365XL Laser-Sculpted Grip Module w/ Manual Safety System - Black
    Grayguns SIG Sauer P365XL Laser-Sculpted Grip Module w/ Manual Safety System - Black
    $219.00
    Out of stock
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  3. 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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  4. 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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  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. Rainier Arms Exclusive ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XC Sentinel LoPro
    ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XC Sentinel LoPro
    $270.00
    Out of stock
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  7. ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XXLC Sentinel
    ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XXLC Sentinel
    $285.00
    Out of stock
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  8. ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XLC Sentinel
    ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XLC Sentinel
    $280.00
    Out of stock
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  9. Rainier Arms Exclusive ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XLC Sentinel LoPro
    ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XLC Sentinel LoPro
    $275.00
    Out of stock
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  10. Rainier Arms Exclusive ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XXLC Sentinel LoPro
    ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XXLC Sentinel LoPro
    $280.00
    Out of stock
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  11. ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XC Sentinel
    ShaloTek Sig Sauer P365 Integrally Compensated RMSc Slide - XC Sentinel
    $275.00
    Out of stock
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  12. ShaloTek Sig Sauer P320 Compact Integrally Compensated RMR Slide - Sentinel
    ShaloTek Sig Sauer P320 Compact Integrally Compensated RMR Slide - Sentinel
    $280.00
    Out of stock
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  13. Rainier Arms Exclusive ShaloTek Sig Sauer P320 Compact Integrally Compensated RMR Slide - Sentinel LoPro
    ShaloTek Sig Sauer P320 Compact Integrally Compensated RMR Slide - Sentinel LoPro
    $275.00
    Out of stock
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  14. ShaloTek Sig Sauer P320 Compact Integrally Compensated RMSC Slide - Sentinel
    ShaloTek Sig Sauer P320 Compact Integrally Compensated RMSC Slide - Sentinel
    $280.00
    Out of stock
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  15. ShaloTek Sig Sauer P365 RMSc Slide - Sentinel
    ShaloTek Sig Sauer P365 RMSc Slide - Sentinel
    $266.00
    Out of stock
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  16. ShaloTek Sig Sauer P365XL RMSc Slide - Sentinel
    ShaloTek Sig Sauer P365XL RMSc Slide - Sentinel
    $270.00
    Out of stock
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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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