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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.

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  5. Battle Arms Development Base Plate for Glock
    Battle Arms Development Base Plate for Glock
    $29.00
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  9. Tyrant Designs Extended Slide Release For Glock Gen 5
    Tyrant Designs Extended Slide Release For Glock Gen 5
    $31.45
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  11. Nomad Defense Flat Trigger Kit For Glock Gen 3-5 - Safety
    Nomad Defense Flat Trigger Kit For Glock Gen 3-5 - Safety
    $49.00
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  12. Taran Tactical Innovations Carry Magazine Base Pad for Glock 9/40 - Black
    Taran Tactical Innovations Carry Magazine Base Pad for Glock 9/40 - Black
    $25.99
    Out of stock
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  13. Taran Tactical Innovations Grand Master Connector Kit for Gen 3 Glock - Competition
    Taran Tactical Innovations Grand Master Connector Kit for Gen 3 Glock - Competition
    $44.99
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  14. L2D Combat Pin Set For Glock Gen 4
    L2D Combat Pin Set For Glock Gen 4
    Out of stock
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  15. Agency Arms Syndicate Trigger For Glock Gen 5
    Agency Arms Syndicate Trigger For Glock Gen 5
    $60.00
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  16. Lantac Ti-PIN Titanium Frame Pins For Glock Gen 1-4
    Lantac Ti-PIN Titanium Frame Pins For Glock Gen 1-4
    $35.99
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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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