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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.

Parts

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  1. Empire Katana Magwell For Sig Sauer P320 AXG
    Empire Katana Magwell For Sig Sauer P320 AXG
    Out of stock
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  2. Empire Stiletto Trigger For Sig Sauer P320 - Black
    Empire Stiletto Trigger For Sig Sauer P320 - Black
    $84.99
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  3. Tyrant Designs Sig Sauer P320 Extended Mag Release
    Tyrant Designs Sig Sauer P320 Extended Mag Release
    Out of stock
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  4. Norsso Sig Sauer P320 Sub/X-Compact Vector RMR Slide - Black DLC
    Norsso Sig Sauer P320 Sub/X-Compact Vector RMR Slide - Black DLC
    $417.05
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  5. DPM Systems Technologies Recoil Reduction System - Sig Sauer P320 X-Compact
    DPM Systems Technologies Recoil Reduction System - Sig Sauer P320 X-Compact
    $90.06
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  6. Empire Katana Magwell For Sig Sauer P320 X-Series - Tano
    Empire Katana Magwell For Sig Sauer P320 X-Series - Tano
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  7. Agency Arms Icarus Sig P320 X-Carry Grip Module - Black
    Agency Arms Icarus Sig P320 X-Carry Grip Module - Black
    $520.00
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  8. Sig Sauer Grip Module Assembly P320 X-Series Full - Black Large
    Sig Sauer Grip Module Assembly P320 X-Series Full - Black Large
    Special Price $49.95 Regular Price $59.99
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  9. Agency Arms Sig P320 Compact Premier Line Threaded Barrel - SS
    Agency Arms Sig P320 Compact Premier Line Threaded Barrel - SS
    $310.00
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  10. Killer Innovations Velocity Sig P320 Compact MOD1 Stripped Slide
    Killer Innovations Velocity Sig P320 Compact MOD1 Stripped Slide
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  11. Mischief Machine Sig Sauer P320 Grip Module - X Compact
    Mischief Machine Sig Sauer P320 Grip Module - X Compact
    $365.00
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  12. Mischief Machine P320 Grip Module - X Compact w/ Safety
    Mischief Machine P320 Grip Module - X Compact w/ Safety
    $365.00
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  13. Mischief Machine Commander Sig Sauer P320 Grip Module Full Size
    Mischief Machine Commander Sig Sauer P320 Grip Module Full Size
    Out of stock
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  14. Sig P320 Slide Catch Assembly Kit - 9/40/357
    Sig P320 Slide Catch Assembly Kit - 9/40/357
    $25.79
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  15. Sig Sauer GRIP MODULE Assembly COMPACT 320, 9/40/357 - Black Small
    Sig Sauer GRIP MODULE Assembly COMPACT 320, 9/40/357 - Black Small
    Special Price $49.99 Regular Price $69.99
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  16. Grayguns Sig Sauer P320 Competition Adjustable Trigger System - Straight
    Grayguns Sig Sauer P320 Competition Adjustable Trigger System - Straight
    $159.00
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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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