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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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  2. Battle Arms Development Base Plate for Glock
    Battle Arms Development Base Plate for Glock
    $29.00
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  4. Rainier Arms Exclusive Battle Arms Development Mag Enhancement Kit For Glock 19
    Battle Arms Development Mag Enhancement Kit For Glock 19
    $124.92 - $180.00
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  7. Fortis MFG Match Grade Barrel with Lone Rifling For Glock 19 - Threaded
    Fortis MFG Match Grade Barrel with Lone Rifling For Glock 19 - Threaded
    $210.85 - $220.35
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  8. True Precision X Fluted Match Grade Threaded Barrel For Glock 19
    True Precision X Fluted Match Grade Threaded Barrel For Glock 19
    $189.99 - $218.49
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  9. Agency Arms 417 Compensator For Glock 43
    Agency Arms 417 Compensator For Glock 43
    $100.00
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  11. Killer Innovations Threaded Velocity Barrel For Glock 17
    Killer Innovations Threaded Velocity Barrel For Glock 17
    $249.00
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  12. Tyrant Designs T-Comp Compensator For Glock Gen 3
    Tyrant Designs T-Comp Compensator For Glock Gen 3
    $80.95
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  13. Tyrant Designs T-Comp Compensator For Glock Gen 4
    Tyrant Designs T-Comp Compensator For Glock Gen 4
    $80.95 - $85.45
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  15. Fortis MFG Match Grade Non-Threaded Barrel For Glock 19 with Lone Rifling
    Fortis MFG Match Grade Non-Threaded Barrel For Glock 19 with Lone Rifling
    $189.95 - $199.95
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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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  2. $1,000.00 and above 3 items
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  2. Barrel 68 items
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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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