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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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  2. SLR M-LOK RAIL SECTION- 5 Slots
    SLR M-LOK RAIL SECTION- 5 Slots
    $33.59
    Out of stock
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  3. SLR M-LOK Rail SECTION-9 slots
    SLR M-LOK Rail SECTION-9 slots
    $30.39
    Out of stock
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  4. SLR M-LOK RAIL SECTION- 3 Slots
    SLR M-LOK RAIL SECTION- 3 Slots
    $33.59
    Out of stock
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  5. Shooters Element CZ Scorpion Flat Trigger - Black
    Shooters Element CZ Scorpion Flat Trigger - Black
    $33.25
    Out of stock
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  6. Shooters Element CZ Scorpion Flat Trigger - Red
    Shooters Element CZ Scorpion Flat Trigger - Red
    $37.99
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  8. Hera Arms Triarii for Glock 19 Black
    Hera Arms Triarii for Glock 19 Black
    $379.05
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  9. Lantac Fluted Threaded Barrel For Glock 19
    Lantac Fluted Threaded Barrel For Glock 19
    Out of stock
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  11. Next Level Armament MPX Lifter Block
    Next Level Armament MPX Lifter Block
    $53.00
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  12. Gun Pro Delta 1 Sight Set For Glock
    Gun Pro Delta 1 Sight Set For Glock
    $84.00
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Items 1-16 of 257

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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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Barrel Length
  1. 3.6" 1 item
  2. 3.7" 1 item
  3. 3.9" 2 items
  4. 4" 1 item
  5. 4.1" 1 item
  6. 4.5" 1 item
  7. 4.6" 1 item
  8. 5" 1 item
Caliber
  1. 9mm 38 items
Category
  1. Pistol parts 250 items
Color
Configuration
  1. Flat 1 item
  2. Gen 3 3 items
  3. Gen 5 6 items
  4. Mid Line 1 item
  5. G17 2 items
  6. G19 5 items
  7. P320 4 items
  8. P365 2 items
  9. Handgun 2 items
Finish
  1. Battleworn 1 item
  2. Black 2 items
  3. Black/Black 1 item
  4. Black DLC 3 items
  5. Black/TiN 1 item
  6. Bronze 2 items
  7. Chameleon 1 item
  8. DLC 18 items
  9. Gold 2 items
  10. Gray 1 item
  11. MDC (Gray) 1 item
  12. Nitride 7 items
  13. Stainless Steel 1 item
  14. PVD/CVD 2 items
  15. Titanium Nitride (TiN) 11 items
  16. Molecular Dense Coating (MDC) 1 item
Is Firearms?
  1. No 257 items
Magazine Capacity
  1. 7rd 1 item
  2. 15rd 1 item
Manufacturer
  1. Agency Arms 19 items
  2. Align Tactical 2 items
  3. Angstadt Arms 1 item
  4. Apex Tactical Specialties 21 items
  5. ARC Division 1 item
  6. Arms Republic 4 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 12 items
  12. Empire 10 items
  13. Faxon Firearms 4 items
  14. Glock 1 item
  15. Grayguns 8 items
  16. Griffin Armament 4 items
  17. Haley Strategic 1 item
  18. HB Industries 2 items
  19. HERA ARMS 1 item
  20. Icarus Precision 1 item
  21. Kagwerks 1 item
  22. Killer Innovations 11 items
  23. Krebs Customs 1 item
  24. L2D Combat 16 items
  25. Lantac 7 items
  26. Lone Wolf Arms 2 items
  27. Midwest Industries 1 item
  28. Mischief Machine 6 items
  29. Next Level Armament 1 item
  30. NIGHT FISION 2 items
  31. Nomad Defense 1 item
  32. Norsso 12 items
  33. Radian Weapons 1 item
  34. Rainier Arms, LLC 6 items
  35. Red Dirt USA 1 item
  36. Shalotek 20 items
  37. Shield Arms 1 item
  38. Sig Mechanics 1 item
  39. Sig Sauer 14 items
  40. SLR Rifleworks 3 items
  41. Spinta Precision 3 items
  42. Sprinco (Tactical Springs) 2 items
  43. Springer Precision 5 items
  44. Stoeger 1 item
  45. Tactical Development 6 items
  46. Taran Tactical Innovations 12 items
  47. Toni Systems 1 item
  48. True Precision 1 item
  49. TXC Holsters 1 item
  50. Tyrant Designs 8 items
  51. Wilson Combat 1 item
Model
  1. CZ Scorpion 1 item
  2. CZ Shadow 1 item
  3. CZ P-10 5 items
  4. FNH 509 2 items
  5. Glock 17 32 items
  6. Glock 19 40 items
  7. Glock 19X 7 items
  8. Glock 20 4 items
  9. Glock 21 4 items
  10. Glock 22 11 items
  11. Glock 23 9 items
  12. Glock 24 8 items
  13. Glock 25 3 items
  14. Glock 26 10 items
  15. Glock 27 8 items
  16. Glock 28 3 items
  17. Glock 29 3 items
  18. Glock 30 3 items
  19. Glock 31 10 items
  20. Glock 32 8 items
  21. Glock 33 8 items
  22. Glock 34 14 items
  23. Glock 35 11 items
  24. Glock 36 1 item
  25. Glock 37 5 items
  26. Glock 38 4 items
  27. Glock 39 4 items
  28. Glock 40 4 items
  29. Glock 41 4 items
  30. Glock 42 1 item
  31. Glock 43 6 items
  32. Glock 43X 7 items
  33. Glock 44 4 items
  34. Glock 45 7 items
  35. Glock 48 10 items
  36. H&K P2000 1 item
  37. H&K P30 1 item
  38. H&K VP9 2 items
  39. Nomad 9 1 item
  40. Sig P220 2 items
  41. Sig P226 3 items
  42. Sig P228 1 item
  43. Sig P229 2 items
  44. Sig P238 1 item
  45. Sig P320 57 items
  46. Sig P365 18 items
  47. Sig P365X 4 items
  48. Sig P365XL 10 items
  49. Sig P938 1 item
  50. Sig MPX 1 item
  51. S&W M&P 1 item
  52. S&W M&P M2.0 2 items
  53. S&W M&P Shield 2 items
  54. Springfield Hellcat 4 items
  55. Springfield XD 1 item
  56. Stoeger STR-9 1 item
  57. Walther PPQ 1 item
Mount
  1. M-LOK 1 item
  2. Picatinny 2 items
Optic Footprint
  1. Holosun 407K/507K 1 item
  2. Shield RMSc 4 items
  3. Trijicon RMR 1 item
Option
  1. Safety 2 items
  2. No Safety 2 items
  3. CZ 9 items
  4. FNH 3 items
  5. Glock 49 items
  6. Heckler & Koch 1 item
  7. Sig Sauer 26 items
  8. Smith & Wesson 3 items
  9. Springfield 2 items
  10. Walther 1 item
  11. Glock 17 1 item
  12. Right-Hand 1 item
  13. Left-Hand 1 item
Platform
  1. CZ 6 items
  2. FNH 2 items
  3. Glock 89 items
  4. H&K 3 items
  5. Sig Sauer 94 items
  6. Smith & Wesson 6 items
  7. Springfield 5 items
  8. Stoeger 1 item
  9. Walther 2 items
Price
  1. $0.00 - $999.99 253 items
  2. $1,000.00 and above 4 items
Product Type
  1. Accessory 2 items
  2. Basepad 4 items
  3. Charging Handle 2 items
  4. Compensator 10 items
  5. Grip Accessory 1 item
  6. Grip Module 14 items
  7. Guide Rod 6 items
  8. Handgun Barrel 33 items
  9. Handgun Sights 1 item
  10. Holster 1 item
  11. Iron Sight 1 item
  12. Magazine 3 items
  13. Magazine Catch 1 item
  14. Magazine Extension 1 item
  15. Magazine Release 5 items
  16. Magwell 17 items
  17. Muzzle Device Accessory 2 items
  18. Optic Plate 2 items
  19. Parts Kit 3 items
  20. Pistol Frame 14 items
  21. Pistol Part 18 items
  22. Pistol Sights 10 items
  23. Recoil Spring 11 items
  24. Red Dot Mount 1 item
  25. Safety Selector 1 item
  26. Sight Post 1 item
  27. Sled Feet 1 item
  28. Slide 50 items
  29. Slide Parts Kit 2 items
  30. Spring 1 item
  31. Thumb Rest 1 item
  32. Top Cover 1 item
  33. Trigger 28 items
  34. Upper Parts Kit 2 items
Size
  1. Small 2 items
  2. 3 Slot 1 item
  3. 5 Slot 1 item
  4. 9 Slot 1 item
  5. X-Compact 2 items
  6. Compact 1 item
  7. Full 1 item
Thread Pitch
  1. 1/2x28 (9mm) 25 items
Threaded
  1. Yes 1 item
  2. No 4 items
Twist Rate
  1. 1:10 20 items
Stock Status
  1. Out of stock 257 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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