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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. Tyrant Designs Magwell For Polymer 80 - Black w/ Gold Screw
    Tyrant Designs Magwell For Polymer 80 - Black w/ Gold Screw
    $62.95
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  2. 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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  3. Taran Tactical Innovations Full Size Competition Magwell for Glock Gen 3 - Flat Black
    Taran Tactical Innovations Full Size Competition Magwell for Glock Gen 3 - Flat Black
    $104.99
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  4. Taran Tactical Innovations Compact Carry Magwell for Glock Gen 3 - Flat Black
    Taran Tactical Innovations Compact Carry Magwell for Glock Gen 3 - Flat Black
    $94.99
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  5. Taran Tactical Innovations Full Size Carry Magwell for Glock Gen 3 - Flat Black
    Taran Tactical Innovations Full Size Carry Magwell for Glock Gen 3 - Flat Black
    $94.99
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  6. Taran Tactical Innovations Compact Carry Magwell for Glock Gen 5 - Flat Black
    Taran Tactical Innovations Compact Carry Magwell for Glock Gen 5 - Flat Black
    $94.99
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  7. Taran Tactical Innovations Full Size Carry Magwell for Glock Gen 5 - Flat Black
    Taran Tactical Innovations Full Size Carry Magwell for Glock Gen 5 - Flat Black
    $94.99
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  8. 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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  9. Tyrant Designs Magwell for Glock 17 Gen 5 - Black
    Tyrant Designs Magwell for Glock 17 Gen 5 - Black
    $62.95
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  10. Nomad Defense Magwell Extension and Backstrap Combo - Compact/Standard
    Nomad Defense Magwell Extension and Backstrap Combo - Compact/Standard
    $79.00
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  11. Agency Arms Sig P320 X Series Magwell - Black
    Agency Arms Sig P320 X Series Magwell - Black
    $100.00
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  12. Empire Katana Magwell For Sig Sauer P320 AXG
    Empire Katana Magwell For Sig Sauer P320 AXG
    Out of stock
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  13. 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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  14. Taran Tactical Innovations 2011 Carry Magwell - Black
    Taran Tactical Innovations 2011 Carry Magwell - Black
    $69.99
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  15. Tyrant Designs Magwell for Glock 43X/48
    Tyrant Designs Magwell for Glock 43X/48
    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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