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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. Apex Tactical Specialties S&W M&P M2.0 Flat Faced Forward Set Trigger Kit
    Apex Tactical Specialties S&W M&P M2.0 Flat Faced Forward Set Trigger Kit
    $171.00
    Out of stock
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  2. 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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  3. 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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  4. Sig Sauer Grip Module Assembly P320 X5 - Black Medium
    Sig Sauer Grip Module Assembly P320 X5 - Black Medium
    Special Price $100.99 Regular Price $119.99
    Out of stock
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  5. L2D Combat Enhanced Upper Parts Kit - SS
    L2D Combat Enhanced Upper Parts Kit - SS
    $133.00
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  6. Battle Arms Development ONE:1 416R Threaded Barrel For Glock 19 - Black Nitride
    Battle Arms Development ONE:1 416R Threaded Barrel For Glock 19 - Black Nitride
    $199.00
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  7. Battle Arms Development ONE:1 4140 Barrel For Glock 19 - Black Nitride
    Battle Arms Development ONE:1 4140 Barrel For Glock 19 - Black Nitride
    $185.99
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  8. Apex Tactical FN 509 Action Enhancement Trigger
    Apex Tactical FN 509 Action Enhancement Trigger
    Out of stock
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  9. Haley Strategic HSP Thirteen Iron Sights For Glock - Full Tritium
    Haley Strategic HSP Thirteen Iron Sights For Glock - Full Tritium
    $139.00
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  10. DPM Systems Technologies Mechanical Recoil Reduction System - Beretta 84FS Cheetah
    DPM Systems Technologies Mechanical Recoil Reduction System - Beretta 84FS Cheetah
    $102.83
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  11. Apex Tactical Specialties Action Enhancement Trigger Kit for Springfield SA-35 / Browning Hi-Power Pistols
    Apex Tactical Specialties Action Enhancement Trigger Kit for Springfield SA-35 / Browning Hi-Power Pistols
    $190.00
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  12. Grayguns Sig Sauer P320 Competition Adjustable Trigger System - Straight
    Grayguns Sig Sauer P320 Competition Adjustable Trigger System - Straight
    $159.00
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  13. 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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  14. Killer Innovations Sig P320 Compensator
    Killer Innovations Sig P320 Compensator
    Out of stock
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  15. Radian Weapons Backstrap & Magwell For Sig P365 X-Macro
    Radian Weapons Backstrap & Magwell For Sig P365 X-Macro
    $149.95
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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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