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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. Apex Tactical Specialties 9mm Threaded Barrel for FN 509 Compact - 3.7"
    Apex Tactical Specialties 9mm Threaded Barrel for FN 509 Compact - 3.7"
    $213.75
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  2. Agency Arms Sig P320 Dual Port Compensator - Black
    Agency Arms Sig P320 Dual Port Compensator - Black
    $100.00
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  3. Apex Tactical Specialties Springfield Hellcat Action Enhancement Trigger - Red
    Apex Tactical Specialties Springfield Hellcat Action Enhancement Trigger - Red
    $85.50
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  4. 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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  5. Rainier Arms Fiber Optic Suppressor Height Sight Set For Glock - LOGO
    Rainier Arms Fiber Optic Suppressor Height Sight Set For Glock - LOGO
    $50.00
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  6. 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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  7. MBX Extreme Complete Magazine for STI/SVI & 2011 Pistols - 17rd
    MBX Extreme Complete Magazine for STI/SVI & 2011 Pistols - 17rd
    $130.00
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  8. 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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  9. 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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  10. Ascalon Arms CZ Scorpion EVO Trigger Shoe - Black
    Ascalon Arms CZ Scorpion EVO Trigger Shoe - Black
    $35.99
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  11. Apex Tactical Specialties Action Enhancement Trigger Kit for Glocks - G43, 43x, 48 - Black
    Apex Tactical Specialties Action Enhancement Trigger Kit for Glocks - G43, 43x, 48 - Black
    $99.75
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  12. 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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  13. Agency Arms AOS Sig P320 ACRO Optic Plate (Includes Sights)
    Agency Arms AOS Sig P320 ACRO Optic Plate (Includes Sights)
    $145.00
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  14. Norsso CZ P-10C Reptile Ported R2 RMR Slide - Black DLC
    Norsso CZ P-10C Reptile Ported R2 RMR Slide - Black DLC
    $436.05
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  15. Faxon Firearms Hellfire Slide For Glock 19 w/ RMR Optic Cut - DLC
    Faxon Firearms Hellfire Slide For Glock 19 w/ RMR Optic Cut - DLC
    $293.48
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  16. 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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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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