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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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  1. Tyrant Designs Suppressor Height Sights for Glock 9/40
    Tyrant Designs Suppressor Height Sights for Glock 9/40
    $62.95
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  2. Tyrant Designs Suppressor Height Sights for Glock Slimline Pistol
    Tyrant Designs Suppressor Height Sights for Glock Slimline Pistol
    $62.95
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  3. Tyrant Designs Sig Sauer P320 Extended Mag Release
    Tyrant Designs Sig Sauer P320 Extended Mag Release
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  4. Tyrant Design Sig Sauer P365 Slide Cap
    Tyrant Design Sig Sauer P365 Slide Cap
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  5. Tyrant Designs Uni-Comp Universal 9mm Compensator
    Tyrant Designs Uni-Comp Universal 9mm Compensator
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  6. Wilson Combat WCP320 Full Grip Module w/ Standard Safety - Tan
    Wilson Combat WCP320 Full Grip Module w/ Standard Safety - Tan
    $67.95
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  7. HB Industries Grand Power Stribog Extended Bolt Stop
    HB Industries Grand Power Stribog Extended Bolt Stop
    $40.59
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  8. Tyrant Design Sig Sauer P365 Magazine Extension
    Tyrant Design Sig Sauer P365 Magazine Extension
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  9. DPM Systems Technologies Recoil Reduction System For Glock 17/22/31/37/34/35 Gen 4 Captured
    DPM Systems Technologies Recoil Reduction System For Glock 17/22/31/37/34/35 Gen 4 Captured
    $87.91
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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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