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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. 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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  2. Agency Arms Sig P320 Dual Port Compensator - Black
    Agency Arms Sig P320 Dual Port Compensator - Black
    $100.00
    Out of stock
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  3. 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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  4. 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
    Out of stock
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  5. Killer Innovations Sig P320 X-Carry Velocity Threaded Barrel
    Killer Innovations Sig P320 X-Carry Velocity Threaded Barrel
    Out of stock
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  6. Agency Arms Sig P320 X Series Magwell - Black
    Agency Arms Sig P320 X Series Magwell - Black
    $100.00
    Out of stock
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  7. Agency Arms Sig P320 Single Port Compensator - Black
    Agency Arms Sig P320 Single Port Compensator - Black
    $100.00
    Out of stock
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  8. Apex Tactical Specialties Sig P320 Forward Set Trigger Kit - Flat
    Apex Tactical Specialties Sig P320 Forward Set Trigger Kit - Flat
    $133.00
    Out of stock
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  9. Apex Tactical Specialties Sig P320 Forward Set Trigger Kit - Curved
    Apex Tactical Specialties Sig P320 Forward Set Trigger Kit - Curved
    $133.00
    Out of stock
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  10. Grayguns Sig Sauer P320 Competition Adjustable Trigger System - Straight
    Grayguns Sig Sauer P320 Competition Adjustable Trigger System - Straight
    $159.00
    Out of stock
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  11. Griffin Armament ATM Sig Sauer P320 Compact Threaded Barrel w/ Micro Carry Comp
    Griffin Armament ATM Sig Sauer P320 Compact Threaded Barrel w/ Micro Carry Comp
    $186.00
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  12. Killer Innovations Sig P320 Compensator
    Killer Innovations Sig P320 Compensator
    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. Price $100.00 - $199.99 Remove This Item
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Barrel Length
  1. 4.57" 1 item
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  1. 9mm 2 items
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  1. Flat 1 item
  2. P320 1 item
  3. P365 1 item
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  1. DLC 1 item
  2. Titanium Nitride (TiN) 1 item
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  1. Agency Arms 4 items
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  3. Danger Close Armament 1 item
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  6. Killer Innovations 2 items
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  1. Sig P320 8 items
  2. Sig P365 2 items
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  1. Sig Sauer 10 items
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  8. $190.00 and above 2 items
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  1. Barrel 3 items
  2. Compensator 3 items
  3. Magwell 1 item
  4. Optic Plate 1 item
  5. Pistol Frame 1 item
  6. Trigger 3 items
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  1. 1/2x28 2 items
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  1. No 1 item
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  1. 1:10 2 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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