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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. Grayguns Sig Sauer P320 X-Series Laser-Sculpted Grip Module - Carry
    Grayguns Sig Sauer P320 X-Series Laser-Sculpted Grip Module - Carry
    $130.00 - $180.00
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  2. Killer Innovations Sig P320 Base Plate
    Killer Innovations Sig P320 Base Plate
    $30.39
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  3. Killer Innovations Sig P320X Magwell
    Killer Innovations Sig P320X Magwell
    $75.99
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  4. Killer Innovations Sig P320C Velocity Non-Threaded Barrel
    Killer Innovations Sig P320C Velocity Non-Threaded Barrel
    $249.00
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  5. Killer Innovations Sig P320 X-Compact Velocity Threaded Barrel
    Killer Innovations Sig P320 X-Compact Velocity Threaded Barrel
    $268.00
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  6. Killer Innovations Velocity Sig Sauer P320 Pro Tucked Compensator
    Killer Innovations Velocity Sig Sauer P320 Pro Tucked Compensator
    $129.49
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  7. L2D Combat Precision Match Sig Sauer P320 Compact 9MM Barrel - Fluted
    L2D Combat Precision Match Sig Sauer P320 Compact 9MM Barrel - Fluted
    $149.99
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  8. True Precision Sig P320 X-Compact 3.6" Non-Threaded Barrel
    True Precision Sig P320 X-Compact 3.6" Non-Threaded Barrel
    $180.49 - $199.49
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  9. True Precision Sig P320 Compact 3.9" Non-Threaded Barrel
    True Precision Sig P320 Compact 3.9" Non-Threaded Barrel
    $180.49 - $199.49
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  10. True Precision Sig P320 Compact 3.9" Threaded Barrel
    True Precision Sig P320 Compact 3.9" Threaded Barrel
    $199.49 - $218.49
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  11. Tyrant Designs Sig Sauer P320 Extended Magazine Well
    Tyrant Designs Sig Sauer P320 Extended Magazine Well
    $58.45 - $64.95
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  12. Tyrant Designs Sig Sauer P320 Extended Magazine Well w/Gold Screw
    Tyrant Designs Sig Sauer P320 Extended Magazine Well w/Gold Screw
    $58.45 - $64.95
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  13. Tyrant Designs T-Comp Sig Sauer P320
    Tyrant Designs T-Comp Sig Sauer P320
    $71.95
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  14. Tyrant Designs Sig Sauer P320 Trigger
    Tyrant Designs Sig Sauer P320 Trigger
    $71.95
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  15. Tyrant Designs Magwell For Glock 19/23 Gen 3-4 w/ Black Screw
    Tyrant Designs Magwell For Glock 19/23 Gen 3-4 w/ Black Screw
    $62.95
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  16. Grayguns Sig Sauer P320 Competition Adjustable Trigger System
    Grayguns Sig Sauer P320 Competition Adjustable Trigger System
    $159.00 - $164.00
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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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