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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 Nomad Defense Hybrid Frame Parts Kit for Glock Gen 4/5
    Nomad Defense Hybrid Frame Parts Kit for Glock Gen 4/5
    $85.00
    Out of stock
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  2. Apex Tactical Specialties Springfield Hellcat Action Enhancement Trigger - Red
    Apex Tactical Specialties Springfield Hellcat Action Enhancement Trigger - Red
    $85.50
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  3. Apex Tactical Specialties Enhanced Short Paddle Slide Release - P10C/F/S
    Apex Tactical Specialties Enhanced Short Paddle Slide Release - P10C/F/S
    $85.50
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  4. Apex Tactical Specialties Polymer Enhancement Trigger Kit for Glock Gen 3 & 4
    Apex Tactical Specialties Polymer Enhancement Trigger Kit for Glock Gen 3 & 4
    Out of stock
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  5. Apex Tactical Specialties CZ P-10 Extended Slide Release
    Apex Tactical Specialties CZ P-10 Extended Slide Release
    $85.50
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  6. DPM Systems Technologies Mechanical Recoil Reduction System - H&K VP-9/SFP-9 & VP-9L/SFP-9L
    DPM Systems Technologies Mechanical Recoil Reduction System - H&K VP-9/SFP-9 & VP-9L/SFP-9L
    $80.44
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  7. Apex Tactical Specialties M&P Shield Action Enhancement Trigger
    Apex Tactical Specialties M&P Shield Action Enhancement Trigger
    $80.75
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  8. Gun Pro Delta 1 Sight Set For Glock
    Gun Pro Delta 1 Sight Set For Glock
    $84.00
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  9. Apex Tactical Specialties Sig P320 Forward Set Trigger Bar Kit
    Apex Tactical Specialties Sig P320 Forward Set Trigger Bar Kit
    $85.50
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  10. Gun Pro Delta 1 Sight Set - FN 509
    Gun Pro Delta 1 Sight Set - FN 509
    $84.00
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  11. Empire Stiletto Trigger For Sig Sauer P320 - Black
    Empire Stiletto Trigger For Sig Sauer P320 - Black
    $84.99
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  12. Tactical Development RipStik Charging Handle w/ Integrated Front Sight For Sig Sauer P320
    Tactical Development RipStik Charging Handle w/ Integrated Front Sight For Sig Sauer P320
    Out of stock
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  13. DPM Systems Technologies Mechanical Recoil Reduction System - M&P Shield & M2.0
    DPM Systems Technologies Mechanical Recoil Reduction System - M&P Shield & M2.0
    $80.92
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  14. Tactical Development Dual Enhanced Flat Trigger For Sig Sauer P365
    Tactical Development Dual Enhanced Flat Trigger For Sig Sauer P365
    Out of stock
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  15. Sig Sauer P320 OEM Slide Completion Kit
    Sig Sauer P320 OEM Slide Completion Kit
    Special Price $83.99 Regular Price $99.99
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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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