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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. Rainier Arms Exclusive ShaloTek Sig Sauer P320 Compact Integrally Compensated RMR Slide - Sentinel LoPro
    ShaloTek Sig Sauer P320 Compact Integrally Compensated RMR Slide - Sentinel LoPro
    $275.00
    Out of stock
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  2. Mischief Machine Commander Sig Sauer P365 Grip Module - Standard
    Mischief Machine Commander Sig Sauer P365 Grip Module - Standard
    $395.00
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  3. ShaloTek Sig Sauer P320 Compact Integrally Compensated RMSC Slide - Sentinel
    ShaloTek Sig Sauer P320 Compact Integrally Compensated RMSC Slide - Sentinel
    $280.00
    Out of stock
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  4. Tyrant Designs Magwell for Glock 17 Gen 5 - Black
    Tyrant Designs Magwell for Glock 17 Gen 5 - Black
    $62.95
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  5. Apex Tactical Specialties Action Enhancement Trigger Kit For Glock - Gen 3/4 - Red
    Apex Tactical Specialties Action Enhancement Trigger Kit For Glock - Gen 3/4 - Red
    $137.75
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  6. Norsso Sig Sauer P320SC Sub/X-Compact pBentham RMR Slide - Black DLC
    Norsso Sig Sauer P320SC Sub/X-Compact pBentham RMR Slide - Black DLC
    $369.55
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  7. Norsso Sig Sauer P320SC Sub/X-Compact Reptile RMR Slide - Black DLC
    Norsso Sig Sauer P320SC Sub/X-Compact Reptile RMR Slide - Black DLC
    $417.05
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  8. Apex Tactical Specialties Action Enhancement Kit for CZ Shadow 2
    Apex Tactical Specialties Action Enhancement Kit for CZ Shadow 2
    $156.75
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  9. Nomad Defense Magwell Extension and Backstrap Combo - Compact/Standard
    Nomad Defense Magwell Extension and Backstrap Combo - Compact/Standard
    $79.00
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  10. Sig Sauer P238 .380ACP Legion Magazine - 7rd
    Sig Sauer P238 .380ACP Legion Magazine - 7rd
    Special Price $43.99 Regular Price $49.99
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  11. Griffin Armament Smith and Wesson M&P Shield Threaded Barrel W/ Micro Carry Comp
    Griffin Armament Smith and Wesson M&P Shield Threaded Barrel W/ Micro Carry Comp
    $186.00
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  12. Killer Innovations Velocity CZ P-10C Compensator
    Killer Innovations Velocity CZ P-10C Compensator
    Out of stock
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  13. Rainier Arms Fiber Optic Suppressor Height Sight Set For Glock
    Rainier Arms Fiber Optic Suppressor Height Sight Set For Glock
    $50.00
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  14. Sig Sauer XRAY3 Day/Night Super - Tall Sight Set
    Sig Sauer XRAY3 Day/Night Super - Tall Sight Set
    $99.99
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  15. Arms Republic Slide Parts Kit for Glock 17 Gen 3
    Arms Republic Slide Parts Kit for Glock 17 Gen 3
    $59.99
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  16. Killer Innovations Sig P320 Compensator
    Killer Innovations Sig P320 Compensator
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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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