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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. Norsso CZ P-10C R2 Reptile OG RMR Slide - Black DLC
    Norsso CZ P-10C R2 Reptile OG RMR Slide - Black DLC
    $436.05
    Out of stock
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  2. Sig Sauer Grip Module Assembly P320 AXG - Black Medium (G10 Grip Panels)
    Sig Sauer Grip Module Assembly P320 AXG - Black Medium (G10 Grip Panels)
    Special Price $337.99 Regular Price $399.99
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  3. L2D Combat P320 X-Compact Precision Match 9mm Barrel - 3.6"
    L2D Combat P320 X-Compact Precision Match 9mm Barrel - 3.6"
    Out of stock
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  4. Arms Republic 9mm Compensator for Glock Gen 3 - Black
    Arms Republic 9mm Compensator for Glock Gen 3 - Black
    $59.95
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  5. Rainier Arms Exclusive Spinta Precision Allegiance Slide for Glock 19 Gen 3 (Rainier Arms Exclusive)
    Spinta Precision Allegiance Slide for Glock 19 Gen 3 (Rainier Arms Exclusive)
    Special Price $286.00 Regular Price $370.00
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  6. Rainier Arms Exclusive Spinta Precision Allegiance Slide for Glock 19 Gen 5 (Rainier Arms Exclusive)
    Spinta Precision Allegiance Slide for Glock 19 Gen 5 (Rainier Arms Exclusive)
    Special Price $286.00 Regular Price $370.00
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  7. Faxon Firearms EXOS-525 Pistol Compensator for Sig Sauer P365/P365XL
    Faxon Firearms EXOS-525 Pistol Compensator for Sig Sauer P365/P365XL
    $78.20
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  8. HB Industries Grand Power Stribog Modular Safety Selector Kit
    HB Industries Grand Power Stribog Modular Safety Selector Kit
    $68.31
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  9. Norsso Sig Sauer P320 Sub/X-Compact Vector RMR Slide - Black DLC
    Norsso Sig Sauer P320 Sub/X-Compact Vector RMR Slide - Black DLC
    $417.05
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  10. Faxon Firearms EXOS-553 Pistol Compensator for Glock Gen 5
    Faxon Firearms EXOS-553 Pistol Compensator for Glock Gen 5
    $78.20
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  11. Taran Tactical Innovations Carry Magazine Base Pad for Glock 9/40 - Black
    Taran Tactical Innovations Carry Magazine Base Pad for Glock 9/40 - Black
    $25.99
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  12. Taran Tactical Innovations Full Size Competition Magwell for Glock Gen 3 - Flat Black
    Taran Tactical Innovations Full Size Competition Magwell for Glock Gen 3 - Flat Black
    $104.99
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  13. Taran Tactical Innovations Compact Carry Magwell for Glock Gen 3 - Flat Black
    Taran Tactical Innovations Compact Carry Magwell for Glock Gen 3 - Flat Black
    $94.99
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  14. Taran Tactical Innovations Full Size Carry Magwell for Glock Gen 3 - Flat Black
    Taran Tactical Innovations Full Size Carry Magwell for Glock Gen 3 - Flat Black
    $94.99
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  15. Taran Tactical Innovations Compact Carry Magwell for Glock Gen 5 - Flat Black
    Taran Tactical Innovations Compact Carry Magwell for Glock Gen 5 - Flat Black
    $94.99
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  16. Taran Tactical Innovations Full Size Carry Magwell for Glock Gen 5 - Flat Black
    Taran Tactical Innovations Full Size Carry Magwell for Glock Gen 5 - Flat Black
    $94.99
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Items 33-48 of 229

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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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  1. $0.00 - $999.99 228 items
  2. $1,000.00 and above 1 item
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  2. Barrel 29 items
  3. Basepad 3 items
  4. Charging Handle 2 items
  5. Compensator 16 items
  6. Extended Slide Stop 1 item
  7. Firing Pin 1 item
  8. Grip Accessory 1 item
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  10. Guide Rod 3 items
  11. Holster 1 item
  12. Iron Sight 1 item
  13. Locking Block 1 item
  14. Magazine 3 items
  15. Magazine Extension 3 items
  16. Magazine Release 6 items
  17. Magwell 15 items
  18. Muzzle Device Accessory 2 items
  19. Optic Plate 1 item
  20. Parts Kit 3 items
  21. Pistol Accessory 1 item
  22. Pistol Frame 10 items
  23. Pistol Part 15 items
  24. Pistol Sights 9 items
  25. Recoil Spring 3 items
  26. Safety Selector 1 item
  27. Slide 46 items
  28. Slide Parts Kit 3 items
  29. Spring 1 item
  30. Top Cover 1 item
  31. Trigger 23 items
  32. Upper Parts Kit 2 items
Size
  1. 3 Slot 1 item
  2. 5 Slot 1 item
  3. 9 Slot 1 item
  4. X-Compact 2 items
  5. Full 1 item
Thread Pitch
  1. 1/2x28 14 items
Threaded
  1. Yes 4 items
  2. No 5 items
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  1. 1:10 6 items
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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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