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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. Gun Pro Delta 1 Sight Set For Glock
    Gun Pro Delta 1 Sight Set For Glock
    $84.00
    Out of stock
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  2. 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
    Out of stock
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  3. Springer Precision SIG P320/P250 9/40 EZ 140mm Base Pads w/ Power Spring
    Springer Precision SIG P320/P250 9/40 EZ 140mm Base Pads w/ Power Spring
    Out of stock
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  4. 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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  5. Apex Tactical Specialties Sig P320 Advanced Flat Trigger
    Apex Tactical Specialties Sig P320 Advanced Flat Trigger
    $61.75
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  6. 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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  7. 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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  8. 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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  9. 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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  10. 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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  11. Springer Precision Sig P320 9mm Open Compensator (1/2 x 28)
    Springer Precision Sig P320 9mm Open Compensator (1/2 x 28)
    $95.00
    Out of stock
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  12. L2D Combat Guide Rod Reducing Ring For Glock Gen 4 to Gen 3
    L2D Combat Guide Rod Reducing Ring For Glock Gen 4 to Gen 3
    $13.30
    Out of stock
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  13. L2D Combat Enhanced Upper Parts Kit - SS
    L2D Combat Enhanced Upper Parts Kit - SS
    $133.00
    Out of stock
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  14. L2D Combat Stainless Steel Fluted Guide Rod Kit Standard Frame for Glock Gen 3
    L2D Combat Stainless Steel Fluted Guide Rod Kit Standard Frame for Glock Gen 3
    Out of stock
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  15. Battle Arms Development ONE:1 416R Threaded Barrel For Glock 19 - Stainless Steel
    Battle Arms Development ONE:1 416R Threaded Barrel For Glock 19 - Stainless Steel
    $230.00
    Out of stock
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  16. 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
    Out of stock
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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. 3.6" 1 item
  2. 3.7" 2 items
  3. 3.9" 2 items
  4. 4" 1 item
  5. 4.57" 1 item
  6. 5" 1 item
Barrel Profile
  1. SDM 1 item
Caliber
  1. 9mm 29 items
Category
  1. Pistol parts 213 items
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  1. Flat 1 item
  2. Gen 3 2 items
  3. Gen 5 2 items
  4. G17 1 item
  5. G19 7 items
  6. P320 3 items
  7. P365 2 items
  8. P365XL 1 item
  9. Fiber Optic - Mid Height Sights 1 item
  10. Handgun 2 items
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  1. Battleworn 1 item
  2. Black 3 items
  3. Black/Black 2 items
  4. Black DLC 3 items
  5. Black Nitride 1 item
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  8. Bronze 2 items
  9. Chameleon 1 item
  10. DLC 16 items
  11. Gold 2 items
  12. Gray 1 item
  13. Melonite 1 item
  14. Nitride 5 items
  15. Stainless Steel 1 item
  16. PVD/CVD 2 items
  17. Titanium Nitride (TiN) 10 items
  18. Molecular Dense Coating (MDC) 1 item
Is Firearms?
  1. No 220 items
Magazine Capacity
  1. 7rd 1 item
  2. 15rd 1 item
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  1. Agency Arms 18 items
  2. Align Tactical 1 item
  3. Angstadt Arms 1 item
  4. Apex Tactical Specialties 24 items
  5. ARC Division 1 item
  6. Arms Republic 3 items
  7. Ascalon Arms 1 item
  8. Brügger & Thomet (B&T) 1 item
  9. Battle Arms Development 3 items
  10. Danger Close Armament 5 items
  11. DPM Systems Technologies 5 items
  12. Driven Arms Co. 1 item
  13. Empire 7 items
  14. Faxon Firearms 2 items
  15. Glock 1 item
  16. Grayguns 4 items
  17. Griffin Armament 3 items
  18. Haley Strategic 1 item
  19. HB Industries 4 items
  20. HERA ARMS 1 item
  21. Killer Innovations 4 items
  22. L2D Combat 16 items
  23. Lantac 9 items
  24. Lone Wolf Arms 1 item
  25. Midwest Industries 1 item
  26. Mischief Machine 8 items
  27. Next Level Armament 1 item
  28. NIGHT FISION 1 item
  29. Nomad Defense 3 items
  30. Norsso 8 items
  31. Rainier Arms, LLC 6 items
  32. Shalotek 11 items
  33. Sharps Bros 1 item
  34. Sig Mechanics 1 item
  35. Sig Sauer 10 items
  36. SLR Rifleworks 3 items
  37. Spinta Precision 1 item
  38. Sprinco (Tactical Springs) 1 item
  39. Springer Precision 5 items
  40. Stoeger 1 item
  41. Swampfox 1 item
  42. Tactical Development 8 items
  43. Taran Tactical Innovations 12 items
  44. Trinity Nevada 1 item
  45. True Precision 2 items
  46. TXC Holsters 1 item
  47. Tyrant Designs 9 items
  48. Wilson Combat 1 item
Model
  1. CZ Scorpion 1 item
  2. CZ Shadow 1 item
  3. CZ P-10 5 items
  4. FNH 509 4 items
  5. FNH FNX-45 1 item
  6. Glock 17 22 items
  7. Glock 19 34 items
  8. Glock 19X 6 items
  9. Glock 20 3 items
  10. Glock 21 3 items
  11. Glock 22 9 items
  12. Glock 23 9 items
  13. Glock 24 7 items
  14. Glock 25 3 items
  15. Glock 26 9 items
  16. Glock 27 8 items
  17. Glock 28 3 items
  18. Glock 29 3 items
  19. Glock 30 3 items
  20. Glock 31 8 items
  21. Glock 32 8 items
  22. Glock 33 8 items
  23. Glock 34 11 items
  24. Glock 35 9 items
  25. Glock 36 1 item
  26. Glock 37 4 items
  27. Glock 38 4 items
  28. Glock 39 4 items
  29. Glock 40 3 items
  30. Glock 41 3 items
  31. Glock 42 1 item
  32. Glock 43 5 items
  33. Glock 43X 5 items
  34. Glock 44 3 items
  35. Glock 45 5 items
  36. Glock 48 8 items
  37. Nomad 9 2 items
  38. Sig P220 1 item
  39. Sig P226 1 item
  40. Sig P229 1 item
  41. Sig P238 1 item
  42. Sig P320 49 items
  43. Sig P365 15 items
  44. Sig P365X 2 items
  45. Sig P365XL 9 items
  46. Sig P938 1 item
  47. Sig MPX 1 item
  48. S&W M&P 1 item
  49. S&W M&P M2.0 2 items
  50. S&W M&P Shield 2 items
  51. Springfield Hellcat 2 items
  52. Stoeger STR-9 1 item
Mount
  1. M-LOK 1 item
  2. Picatinny 2 items
Optic Footprint
  1. Shield RMSc 3 items
Option
  1. Safety 2 items
  2. No Safety 2 items
  3. CZ 9 items
  4. FNH 5 items
  5. Glock 50 items
  6. Sig Sauer 27 items
  7. Smith & Wesson 4 items
  8. Springfield 1 item
  9. Right-Hand 1 item
  10. Left-Hand 1 item
Platform
  1. Beretta 1 item
  2. CZ-USA 7 items
  3. FNH 5 items
  4. Glock 72 items
  5. Sig Sauer 75 items
  6. Smith & Wesson 5 items
  7. Springfield 2 items
  8. Stoeger 1 item
Price
  1. $0.00 - $999.99 219 items
  2. $1,000.00 and above 1 item
Product Type
  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 13 items
  23. Pistol Part 16 items
  24. Pistol Sights 9 items
  25. Recoil Spring 5 items
  26. Sled Feet 1 item
  27. Slide 38 items
  28. Slide Parts Kit 2 items
  29. Spring 1 item
  30. Top Cover 1 item
  31. Trigger 26 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 13 items
Threaded
  1. Yes 3 items
  2. No 6 items
Twist Rate
  1. 1:10 6 items
  2. 1:16 1 item
Stock Status
  1. Out of stock 220 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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