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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.

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  1. Glock OEM 9mm and .40SW Performance Trigger
    Glock OEM 9mm and .40SW Performance Trigger
    $94.99
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  3. Tyrant Designs Magwell for Glock 17 Gen 5 - Black
    Tyrant Designs Magwell for Glock 17 Gen 5 - Black
    $62.95
    Out of stock
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  7. Norsso RMR Cover Plate For Sig Sauer P320
    Norsso RMR Cover Plate For Sig Sauer P320
    $35.00
    Out of stock
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  12. Empire Javelin Recoil System For Sig P365XL / XMacro
    Empire Javelin Recoil System For Sig P365XL / XMacro
    $64.99
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  14. Empire Katana V3 Magwell For Glock 43X/48
    Empire Katana V3 Magwell For Glock 43X/48
    Out of stock
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  15. HB Industries CZ P10 Reduced Weight Striker Spring Set
    HB Industries CZ P10 Reduced Weight Striker Spring Set
    $12.38
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  16. 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
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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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