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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. Sig Sauer Grip Module Assembly P320 X-Series Full - Black Medium
    Sig Sauer Grip Module Assembly P320 X-Series Full - Black Medium
    Special Price $49.99 Regular Price $59.99
    Out of stock
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  2. Agency Arms AOS Sig P320 ACRO Optic Plate (Includes Sights)
    Agency Arms AOS Sig P320 ACRO Optic Plate (Includes Sights)
    $145.00
    Out of stock
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  3. Wilson Combat WCP320 Full Grip Module w/ Standard Safety - Tan
    Wilson Combat WCP320 Full Grip Module w/ Standard Safety - Tan
    $67.95
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  4. Agency Arms Sig P320 Compact/X-Carry Syndicate S1 Field Slide - DLC
    Agency Arms Sig P320 Compact/X-Carry Syndicate S1 Field Slide - DLC
    $575.00
    Out of stock
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  5. Agency Arms Sig P320 Compact/X-Carry Syndicate S1 Urban AOS Slide
    Agency Arms Sig P320 Compact/X-Carry Syndicate S1 Urban AOS Slide
    $575.00
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  6. Agency Arms Sig P320 Dual Port Compensator - Black
    Agency Arms Sig P320 Dual Port Compensator - Black
    $100.00
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  7. Norsso Sig Sauer P320C Reptile Ported RMR Slide - Black DLC
    Norsso Sig Sauer P320C Reptile Ported RMR Slide - Black DLC
    $436.05
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  8. Grayguns SIG Sauer P365XL Laser-Sculpted Grip Module w/ Manual Safety System - Black
    Grayguns SIG Sauer P365XL Laser-Sculpted Grip Module w/ Manual Safety System - Black
    $219.00
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  9. Grayguns SIG Sauer P365 Laser-Sculpted Grip Module w/ Manual Safety System - Black
    Grayguns SIG Sauer P365 Laser-Sculpted Grip Module w/ Manual Safety System - Black
    $169.00
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  10. Trinity Nevada PiRho Sig Sauer P320 Complete Slide - DLC Slide RMR / TiN Barrel
    Trinity Nevada PiRho Sig Sauer P320 Complete Slide - DLC Slide RMR / TiN Barrel
    $1,645.00
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  11. Rainier Arms Exclusive Danger Close Armament DCA-320 Select Match 9mm Barrel For Sig P320 - (3.9")
    Danger Close Armament DCA-320 Select Match 9mm Barrel For Sig P320 - (3.9")
    Out of stock
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  12. Faxon Firearms Match Series Sig Sauer P365XL 9mm Threaded Barrel
    Faxon Firearms Match Series Sig Sauer P365XL 9mm Threaded Barrel
    Out of stock
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  13. Rainier Arms Exclusive Danger Close Armament DCA-365 Select Match 9mm Threaded Barrel For Sig P365 - (3.1")
    Danger Close Armament DCA-365 Select Match 9mm Threaded Barrel For Sig P365 - (3.1")
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  14. Rainier Arms Exclusive Danger Close Armament DCA-365 Select Match 9mm Barrel For Sig P365 - (3.1")
    Danger Close Armament DCA-365 Select Match 9mm Barrel For Sig P365 - (3.1")
    Out of stock
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  15. Rainier Arms Exclusive Danger Close Armament DCA-X5 Select Match 9mm Barrel For Sig P320 X-Five - (5")
    Danger Close Armament DCA-X5 Select Match 9mm Barrel For Sig P320 X-Five - (5")
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  16. Empire Tanto Magazine Base Pad for Sig Sauer P365 X/XL
    Empire Tanto Magazine Base Pad for Sig Sauer P365 X/XL
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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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