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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 Sig P320 Advanced Flat Trigger
    Apex Tactical Specialties Sig P320 Advanced Flat Trigger
    $61.75
    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
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  4. Apex Tactical Specialties Sig P320 Forward Set Trigger Bar Kit
    Apex Tactical Specialties Sig P320 Forward Set Trigger Bar Kit
    $85.50
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  5. 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
    Out of stock
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  6. Agency Arms Urban Combat Stripped Slide For Glock 19 Gen 4 - DLC
    Agency Arms Urban Combat Stripped Slide For Glock 19 Gen 4 - DLC
    $950.00
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  7. 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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  8. Lantac Ti-PIN Titanium Frame Pins For Glock Gen 1-4
    Lantac Ti-PIN Titanium Frame Pins For Glock Gen 1-4
    $35.99
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  9. 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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  10. 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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  11. Agency Arms Mid Line Fluted/Threaded Barrel For Glock 17 Gen 5
    Agency Arms Mid Line Fluted/Threaded Barrel For Glock 17 Gen 5
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  12. Agency Arms Mid Line Fluted/Threaded Barrel For Glock 19 Gen 5
    Agency Arms Mid Line Fluted/Threaded Barrel For Glock 19 Gen 5
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  13. Apex Tactical FN 509 Action Enhancement Trigger
    Apex Tactical FN 509 Action Enhancement Trigger
    Out of stock
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  14. L2D Combat Catalyst Stripped Slide for Glock 17 Gen 3 - DLC Black
    L2D Combat Catalyst Stripped Slide for Glock 17 Gen 3 - DLC Black
    Special Price $335.99 Regular Price $480.00
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  15. Tactical Springs (Sprinco) Recoil Management Guide Rod System Versatility Kit - For Glock 19 Gen 1-3
    Tactical Springs (Sprinco) Recoil Management Guide Rod System Versatility Kit - For Glock 19 Gen 1-3
    $94.95
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  16. TXC Holsters X1 Ally For Glock 9/40 w/ Mag Pouch - RH Black
    TXC Holsters X1 Ally For Glock 9/40 w/ Mag Pouch - RH Black
    $104.99
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Items 17-32 of 218

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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. 9mm 29 items
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  1. Pistol parts 211 items
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Is Firearms?
  1. No 218 items
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  1. 7rd 1 item
  2. 15rd 1 item
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  23. Lantac 9 items
  24. Lone Wolf Arms 1 item
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  27. Next Level Armament 1 item
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  27. Glock 38 4 items
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  31. Glock 42 1 item
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  35. Glock 45 5 items
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  37. Nomad 9 2 items
  38. Sig P22X 1 item
  39. Sig P220 2 items
  40. Sig P226 2 items
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  43. Sig P238 2 items
  44. Sig P320 48 items
  45. Sig P365 15 items
  46. Sig P365X 2 items
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  48. Sig P938 1 item
  49. Sig MPX 1 item
  50. S&W M&P 1 item
  51. S&W M&P M2.0 2 items
  52. S&W M&P Shield 2 items
  53. Springfield Hellcat 2 items
  54. Stoeger STR-9 1 item
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  4. Glock 72 items
  5. Sig Sauer 72 items
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  7. Springfield 2 items
  8. Stoeger 1 item
Price
  1. $0.00 - $999.99 217 items
  2. $1,000.00 and above 1 item
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  1. Accessory 4 items
  2. Barrel 26 items
  3. Basepad 3 items
  4. Charging Handle 3 items
  5. Compensator 14 items
  6. Firing Pin 1 item
  7. Grip Accessory 1 item
  8. Grip Module 7 items
  9. Guide Rod 3 items
  10. Handgun Barrel 1 item
  11. Handgun Sights 1 item
  12. Holster 1 item
  13. Iron Sight 1 item
  14. Locking Block 1 item
  15. Magazine 3 items
  16. Magazine Extension 3 items
  17. Magazine Release 5 items
  18. Magwell 12 items
  19. Muzzle Device Accessory 2 items
  20. Optic Plate 1 item
  21. Parts Kit 3 items
  22. Pistol Frame 14 items
  23. Pistol Part 16 items
  24. Pistol Sights 9 items
  25. Recoil Spring 5 items
  26. Sled Feet 1 item
  27. Slide 34 items
  28. Slide Parts Kit 2 items
  29. Spring 1 item
  30. Top Cover 1 item
  31. Trigger 27 items
  32. Trigger / Hammer Pins 1 item
  33. Upper Parts Kit 2 items
Size
  1. 3 Slot 1 item
  2. 5 Slot 1 item
  3. 9 Slot 1 item
  4. X-Compact 3 items
  5. Compact 2 items
  6. Full 1 item
Thread Pitch
  1. 1/2x28 14 items
Threaded
  1. Yes 3 items
  2. No 5 items
Twist Rate
  1. 1:10 7 items
  2. 1:16 1 item
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  1. Out of stock 218 items Remove This Item
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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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