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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. Rainier Arms Exclusive Danger Close Armament Silicon Carbide Sig Sauer P320 X-Series Full Size Grip Module - Medium
    Danger Close Armament Silicon Carbide Sig Sauer P320 X-Series Full Size Grip Module - Medium
    $300.00 - $375.00
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  2. Rainier Arms Exclusive Danger Close Armament Silicon Carbide Sig Sauer P320 X-Series Carry Size Grip Module - Medium
    Danger Close Armament Silicon Carbide Sig Sauer P320 X-Series Carry Size Grip Module - Medium
    $300.00 - $375.00
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  3. Rainier Arms Exclusive Danger Close Armament Silicon Carbide Sig Sauer P320 X-Series Compact Size Grip Module - Medium
    Danger Close Armament Silicon Carbide Sig Sauer P320 X-Series Compact Size Grip Module - Medium
    $300.00 - $375.00
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  4. Rainier Arms Exclusive The Gun Co. SS320 Sig P320 Compact Slide
    The Gun Co. SS320 Sig P320 Compact Slide
    $390.00 - $479.00
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  6. True Precision Sig Sauer P365 Slide w/ RMS Cut & Cover Plate
    True Precision Sig Sauer P365 Slide w/ RMS Cut & Cover Plate
    $375.25
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  7. True Precision Sig Sauer P365XL Slide w/ RMS Cut & Cover Plate
    True Precision Sig Sauer P365XL Slide w/ RMS Cut & Cover Plate
    $375.25
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  10. Agency Arms Sig P320 Compact Premier Line Threaded Barrel
    Agency Arms Sig P320 Compact Premier Line Threaded Barrel
    $310.00
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  11. Agency Arms Sig P320 Compact Premier Line Barrel
    Agency Arms Sig P320 Compact Premier Line Barrel
    $300.00
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  12. Sig Sauer Custom Works P320 Fire Control Unit (FCU) 9/40/357
    Sig Sauer Custom Works P320 Fire Control Unit (FCU) 9/40/357
    $349.99
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  13. Sig Sauer Custom Works P365 Fire Control Unit (FCU)
    Sig Sauer Custom Works P365 Fire Control Unit (FCU)
    $349.99
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  15. Sig Sauer Grip Module Assembly P320 AXG - Black Medium (G10 Grip Panels)
    Sig Sauer Grip Module Assembly P320 AXG - Black Medium (G10 Grip Panels)
    Special Price $337.99 Regular Price $399.99
    Out of stock
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  16. Mischief Machine Commander Sig Sauer P365 Grip Module - Standard
    Mischief Machine Commander Sig Sauer P365 Grip Module - Standard
    $395.00
    Out of stock
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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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  1. Platform Sig Sauer Remove This Item
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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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