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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. 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
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  2. Brügger & Thomet (B&T) Universal Service Weapon USW for Sig Sauer P320
    Brügger & Thomet (B&T) Universal Service Weapon USW for Sig Sauer P320
    $299.00
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  3. Springer Precision P320 Extended Magazine Release - Production/ESP
    Springer Precision P320 Extended Magazine Release - Production/ESP
    Out of stock
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  4. Tyrant Designs T-Comp Sig Sauer P320
    Tyrant Designs T-Comp Sig Sauer P320
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  5. 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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  6. 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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  7. 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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  8. Agency Arms Sig P320 Compact/X-Carry Gavel Slide - DLC
    Agency Arms Sig P320 Compact/X-Carry Gavel Slide - DLC
    $825.00
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  9. Agency Arms Sig P320 Single Port Compensator - Black
    Agency Arms Sig P320 Single Port Compensator - Black
    $100.00
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  10. 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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  11. Agency Arms Sig P320 Compact/X-Carry Syndicate S2 Slide
    Agency Arms Sig P320 Compact/X-Carry Syndicate S2 Slide
    $575.00
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  12. Grayguns Sig Sauer P320 X-Five Laser-Sculpted Grip Module - TXG Tungsten-Infused
    Grayguns Sig Sauer P320 X-Five Laser-Sculpted Grip Module - TXG Tungsten-Infused
    $379.00
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  13. Agency Arms Sig P320 X Series Magwell - Black
    Agency Arms Sig P320 X Series Magwell - Black
    $100.00
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  14. Springer Precision Sig P320 9mm Open Compensator (M13.5 x 1 LH)
    Springer Precision Sig P320 9mm Open Compensator (M13.5 x 1 LH)
    $95.00
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  15. Apex Tactical Specialties Sig P320 Forward Set Trigger Kit - Curved
    Apex Tactical Specialties Sig P320 Forward Set Trigger Kit - Curved
    $133.00
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  16. Sig Sauer Grip Module Assembly P320 X-Series Full - Black Medium
    Sig Sauer Grip Module Assembly P320 X-Series Full - Black Medium
    Special Price $49.99 Regular Price $59.99
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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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