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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. Faxon Firearms EXOS-513 Pistol Compensator for Glock and FX-19
    Faxon Firearms EXOS-513 Pistol Compensator for Glock and FX-19
    $78.20
    Out of stock
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  2. Faxon Firearms EXOS-515 Pistol Compensator for Sig Sauer P320
    Faxon Firearms EXOS-515 Pistol Compensator for Sig Sauer P320
    $78.20
    Out of stock
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  3. Rainier Arms Exclusive Nomad Defense Magwell Extension and Backstrap Combo - 9F Frame
    Nomad Defense Magwell Extension and Backstrap Combo - 9F Frame
    $79.00
    Out of stock
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  4. Faxon Firearms EXOS-525 Pistol Compensator for Sig Sauer P365/P365XL
    Faxon Firearms EXOS-525 Pistol Compensator for Sig Sauer P365/P365XL
    $78.20
    Out of stock
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  5. Faxon Firearms EXOS-553 Pistol Compensator for Glock Gen 5
    Faxon Firearms EXOS-553 Pistol Compensator for Glock Gen 5
    $78.20
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  6. Empire Katana Magwell For Sig Sauer P320 X-Series - Tano
    Empire Katana Magwell For Sig Sauer P320 X-Series - Tano
    Out of stock
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  7. Nomad Defense Magwell Extension and Backstrap Combo - Compact/Standard
    Nomad Defense Magwell Extension and Backstrap Combo - Compact/Standard
    $79.00
    Out of stock
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  8. Lantac GFP-E Upgrade Firing Pin for Glock
    Lantac GFP-E Upgrade Firing Pin for Glock
    $78.99
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  9. Empire Katana Magwell For Sig Sauer P320 AXG
    Empire Katana Magwell For Sig Sauer P320 AXG
    Out of stock
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  10. Empire Kote Grip Panels For Sig Sauer P320 SXG
    Empire Kote Grip Panels For Sig Sauer P320 SXG
    Out of stock
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  11. Tactical Development Enhanced Magwell For Sig Sauer P365 X-Macro
    Tactical Development Enhanced Magwell For Sig Sauer P365 X-Macro
    $71.99
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  12. Sig Sauer Grip Module Assembly P365XL Spectre Series Laser Engraved LXG - Gray
    Sig Sauer Grip Module Assembly P365XL Spectre Series Laser Engraved LXG - Gray
    Special Price $79.95 Regular Price $89.99
    Out of stock
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  13. Tyrant Designs T-Comp Sig Sauer P320
    Tyrant Designs T-Comp Sig Sauer P320
    Out of stock
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  14. Tyrant Designs Uni-Comp Universal 9mm Compensator
    Tyrant Designs Uni-Comp Universal 9mm Compensator
    Out of stock
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  15. Nomad Defense Hybrid Frame Parts Kit for Glock Gen 4/5 - No Trigger
    Nomad Defense Hybrid Frame Parts Kit for Glock Gen 4/5 - No Trigger
    $75.00
    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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