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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. Killer Innovations Velocity CZ P-10 C/F Trigger
    Killer Innovations Velocity CZ P-10 C/F Trigger
    $54.92 - $79.99
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  2. Killer Innovations Trigger Shoe for Glock Gen 1-4
    Killer Innovations Trigger Shoe for Glock Gen 1-4
    $115.89
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  3. Killer Innovations Velocity CZ P-10 S Trigger Shoe
    Killer Innovations Velocity CZ P-10 S Trigger Shoe
    $79.99
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  4. Grayguns SIG Sauer P365XL Laser-Sculpted Grip Module
    Grayguns SIG Sauer P365XL Laser-Sculpted Grip Module
    $120.00 - $170.00
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  6. Killer Innovations Sig P320 X-Carry Velocity Non-Threaded Barrel
    Killer Innovations Sig P320 X-Carry Velocity Non-Threaded Barrel
    $249.00
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  7. Faxon Firearms Match Series M&P Shield 9mm Threaded Barrel
    Faxon Firearms Match Series M&P Shield 9mm Threaded Barrel
    $170.20 - $188.60
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  8. True Precision Springfield Hellcat Non-Threaded Barrel
    True Precision Springfield Hellcat Non-Threaded Barrel
    $161.49 - $180.49
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  11. Sig Sauer 365XL Standard Grip Module Assembly
    Sig Sauer 365XL Standard Grip Module Assembly
    $50.99 - $89.99
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  12. Killer Innovations Sancer Slide for Glock 17 Gen 5
    Killer Innovations Sancer Slide for Glock 17 Gen 5
    $251.92
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  13. Ribbons Free Good Killer Innovations Sancer Slide for Glock 17 Gen 3
    Killer Innovations Sancer Slide for Glock 17 Gen 3
    $251.92
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  14. Tyrant Designs Sig Sauer P320 Trigger
    Tyrant Designs Sig Sauer P320 Trigger
    $71.95
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Items 81-96 of 646

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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. 3.1" 2 items
  2. 3.25" 1 item
  3. 3.5" 1 item
  4. 3.54" 1 item
  5. 3.6" 2 items
  6. 3.66" 1 item
  7. 3.7" 2 items
  8. 3.86" 1 item
  9. 3.9" 7 items
  10. 4.02" 2 items
  11. 4.37" 1 item
  12. 4.4" 1 item
  13. 4.46" 1 item
  14. 4.5" 2 items
  15. 4.57" 1 item
  16. 4.6" 2 items
  17. 5" 1 item
Barrel Profile
  1. Non-fluted 1 item
Caliber
  1. .45 ACP 2 items
  2. 9mm 115 items
Category
  1. Pistol parts 639 items
Color
Configuration
  1. 1st - 3rd Gen 1 item
  2. 9mm, .40, .357 1 item
  3. .45 ACP 1 item
  4. Curved 1 item
  5. Gen 1-3 2 items
  6. Gen 3 19 items
  7. Gen 4 16 items
  8. GEN 4/5 1 item
  9. Gen 5 13 items
  10. Glock .40 cal Gen4 1 item
  11. Glock 9mm Gen4 1 item
  12. Glock Gen 5 2 items
  13. Large Backstrap 2 items
  14. Med Backstrap 2 items
  15. No Backstrap 2 items
  16. Right Hand 1 item
  17. Stainless Steel 2 items
  18. Standard 1 item
  19. Straight 1 item
  20. Titanium 1 item
  21. Tungsten 2 items
  22. Mid Line 1 item
  23. G17 12 items
  24. G19 17 items
  25. G26 2 items
  26. G42 1 item
  27. G43 9 items
  28. P320 9 items
  29. P365 4 items
  30. P365XL 2 items
  31. Fiber Optic - Mid Height Sights 1 item
  32. Tritium Stealth Sights 1 item
  33. Handgun 5 items
Finish
  1. Aluminum 2 items
  2. Battleworn 1 item
  3. Black 11 items
  4. Black/Black 5 items
  5. Black DLC 5 items
  6. Black/Nickel 5 items
  7. Black/TiN 5 items
  8. Blue 3 items
  9. Cerakote 1 item
  10. Clear 1 item
  11. DLC 46 items
  12. Gold 10 items
  13. Gray 4 items
  14. Grey 5 items
  15. MDC (Gray) 1 item
  16. Melonite 1 item
  17. NeoChromatic 1 item
  18. Nitride 10 items
  19. Polished 1 item
  20. Red 2 items
  21. Titanium Nitride 1 item
  22. Anodize 3 items
  23. PVD/CVD 5 items
  24. Quench Polish Quench (QPQ) 1 item
  25. Titanium Nitride (TiN) 42 items
  26. Molecular Dense Coating (MDC) 17 items
Gas Length
  1. Pistol 1 item
Height
  1. Absolute Co-Witness 1 item
Is Firearms?
  1. No 646 items
Magazine Capacity
  1. 6rd 1 item
  2. 8rd 3 items
  3. 10rd 1 item
Manufacturer
  1. Aeroknox 1 item
  2. Agency Arms 35 items
  3. Align Tactical 7 items
  4. Apex Tactical Specialties 32 items
  5. ARC Division 4 items
  6. Armaspec 1 item
  7. Arms Republic 6 items
  8. Ascalon Arms 1 item
  9. Battle Arms Development 6 items
  10. Benchmade 1 item
  11. CAA 5 items
  12. CMC Triggers 3 items
  13. Danger Close Armament 10 items
  14. Dark Hour Defense 2 items
  15. Devil Dog Concepts 3 items
  16. DPM Systems Technologies 51 items
  17. Elzetta Design LLC 1 item
  18. Emissary Development 1 item
  19. Empire 5 items
  20. Faction 1 item
  21. Faxon Firearms 17 items
  22. Fortis MFG 3 items
  23. Forward Controls Design 9 items
  24. GoGun USA 2 items
  25. Grayguns 27 items
  26. Grey Ghost Precision 4 items
  27. Griffin Armament 9 items
  28. Handleitgrips 9 items
  29. HB Industries 4 items
  30. Kagwerks 3 items
  31. Killer Innovations 62 items
  32. KNS Precision 1 item
  33. Krebs Customs 1 item
  34. L2D Combat 5 items
  35. Lantac 9 items
  36. Laugo Arms 1 item
  37. Lone Wolf Arms 13 items
  38. Magpul Industries 3 items
  39. Matrix Arms 2 items
  40. Mirzon 3 items
  41. Mischief Machine 6 items
  42. Modular Evolution LLC 1 item
  43. NIGHT FISION 25 items
  44. Nighthawk Custom 6 items
  45. Nomad Defense 14 items
  46. Norsso 15 items
  47. Obsidian Arms 2 items
  48. Odin Works 1 item
  49. Polymer80 3 items
  50. Radian Weapons 3 items
  51. Rainier Arms, LLC 6 items
  52. Rainier Industries 1 item
  53. Red Dirt USA 5 items
  54. Reptilia Corp 1 item
  55. S3F Solutions 5 items
  56. SCT Manufacturing 5 items
  57. Shalotek 6 items
  58. Sharps Bros 10 items
  59. Shield Arms 1 item
  60. Sig Mechanics 1 item
  61. Sig Sauer 33 items
  62. Spinta Precision 4 items
  63. Sprinco (Tactical Springs) 8 items
  64. Springer Precision 5 items
  65. Strike Industries 6 items
  66. Swampfox 2 items
  67. Tactical Development 3 items
  68. Tam Tamography 1 item
  69. Taran Tactical Innovations 6 items
  70. Taylor Freelance 1 item
  71. The Gun Co. 1 item
  72. Timney Triggers 2 items
  73. Toni Systems 5 items
  74. Trijicon 2 items
  75. Trinity Nevada 7 items
  76. TruCalibre 1 item
  77. True Precision 26 items
  78. TruGlo 2 items
  79. Tyrant Designs 46 items
  80. Wolff Gunsprings 2 items
  81. Zaffiri Precision 2 items
  82. ZEV Technologies 1 item
Model
  1. Beretta 92X 1 item
  2. Beretta 92FS 1 item
  3. Beretta 96 1 item
  4. Beretta 98 1 item
  5. Canik TP9 1 item
  6. CZ 75 3 items
  7. CZ Shadow 2 items
  8. CZ P-01 1 item
  9. CZ P-10 11 items
  10. FNH 509 2 items
  11. FNH FNS 1 item
  12. Glock 17 109 items
  13. Glock 19 138 items
  14. Glock 19X 20 items
  15. Glock 20 9 items
  16. Glock 21 9 items
  17. Glock 22 36 items
  18. Glock 23 38 items
  19. Glock 24 21 items
  20. Glock 25 10 items
  21. Glock 26 36 items
  22. Glock 27 25 items
  23. Glock 28 5 items
  24. Glock 29 7 items
  25. Glock 30 7 items
  26. Glock 31 33 items
  27. Glock 32 31 items
  28. Glock 33 24 items
  29. Glock 34 51 items
  30. Glock 35 34 items
  31. Glock 36 6 items
  32. Glock 37 23 items
  33. Glock 38 18 items
  34. Glock 39 17 items
  35. Glock 40 7 items
  36. Glock 41 7 items
  37. Glock 42 8 items
  38. Glock 43 32 items
  39. Glock 43X 23 items
  40. Glock 44 7 items
  41. Glock 45 19 items
  42. Glock 47 4 items
  43. Glock 48 28 items
  44. H&K P2000 2 items
  45. H&K P30 3 items
  46. H&K VP9 4 items
  47. Sig P22X 4 items
  48. Sig P220 8 items
  49. Sig P226 9 items
  50. Sig P228 4 items
  51. Sig P229 5 items
  52. Sig P238 2 items
  53. Sig P320 101 items
  54. Sig P365 34 items
  55. Sig P365X 9 items
  56. Sig P365XL 24 items
  57. Sig P365 X-Macro 6 items
  58. Sig P938 2 items
  59. S&W M&P 5 items
  60. S&W M&P M2.0 4 items
  61. S&W M&P Shield 8 items
  62. Springfield Hellcat 11 items
  63. Springfield XD 1 item
  64. Staccato 2011 2 items
  65. Walther PPQ 2 items
  66. Walther Q4/Q5 1 item
Optic Footprint
  1. Holosun 407K/507K 1 item
  2. Shield RMSc 1 item
  3. Trijicon RMR 5 items
Option
  1. FN 509 1 item
  2. Standard 1 item
  3. 6lb 1 item
  4. 6.5lb 1 item
  5. 4lb 1 item
  6. V1 1 item
  7. V2 2 items
  8. V3 1 item
  9. Manual Safety 1 item
  10. (Green) - 13 lbs 2 items
  11. (Blue) - 15 lbs 2 items
  12. (Red) - 18 lbs 2 items
  13. CZ 12 items
  14. FNH 2 items
  15. Glock 206 items
  16. Heckler & Koch 1 item
  17. Sig Sauer 67 items
  18. Smith & Wesson 12 items
  19. Springfield 3 items
  20. Walther 2 items
  21. Glock 17 1 item
  22. White/White 1 item
  23. White/Black 1 item
  24. Orange/Black 1 item
  25. White/Blank 1 item
  26. Flared 1 item
Platform
  1. 1911 6 items
  2. AR-10 1 item
  3. Beretta 1 item
  4. Canik 2 items
  5. CZ-USA 17 items
  6. FNH 2 items
  7. Glock 285 items
  8. H&K 7 items
  9. Sig Sauer 170 items
  10. Smith & Wesson 18 items
  11. Springfield 15 items
  12. Staccato 6 items
  13. Walther 7 items
Price
  1. $0.00 - $999.99 641 items
  2. $1,000.00 and above 5 items
Product Type
  1. Accessory 4 items
  2. Adapter Plate 1 item
  3. BackPack 1 item
  4. Backplate 2 items
  5. Barrel 117 items
  6. Basepad 10 items
  7. Bipod Mount 1 item
  8. Bolt Catch 1 item
  9. Charging Handle 3 items
  10. Compensator 34 items
  11. Connector 1 item
  12. Extended Slide Stop 3 items
  13. Failure Resistant Extractor 1 item
  14. Fire Control Unit 2 items
  15. Flashlight Accessory 1 item
  16. Grip Accessory 9 items
  17. Grip Module 27 items
  18. Guide Rod 30 items
  19. Handgun Grip 3 items
  20. Handgun Sights 24 items
  21. Iron Sight 1 item
  22. Knife 1 item
  23. Laser 2 items
  24. Locking Block 2 items
  25. Magazine 5 items
  26. Magazine Accessory 2 items
  27. Magazine Catch 3 items
  28. Magazine Extension 4 items
  29. Magazine Release 15 items
  30. Magwell 33 items
  31. Optic Plate 5 items
  32. Parts Kit 6 items
  33. Pistol Accessory 10 items
  34. Pistol Frame 27 items
  35. Pistol Grip 1 item
  36. Pistol Part 36 items
  37. Pistol Sights 9 items
  38. Rear Sight 1 item
  39. Recoil Spring 45 items
  40. Safety Selector 1 item
  41. Sight Post 2 items
  42. Sled Feet 1 item
  43. Slide 77 items
  44. Slide Parts Kit 5 items
  45. Slide Plate 7 items
  46. Spring 6 items
  47. Stabilizer Kit 4 items
  48. Take Down / Pivot Pins 1 item
  49. Thumb Rest 1 item
  50. Trigger 56 items
  51. Trigger / Hammer Pins 1 item
Size
  1. Small 2 items
  2. Medium 1 item
  3. Large 2 items
  4. Micro-Compact 1 item
  5. X-Compact 4 items
  6. Sub-Compact 1 item
  7. Compact 12 items
  8. Carry 1 item
  9. Full 5 items
Thread Pitch
  1. 1/2x28 43 items
  2. M13.5x1 LH 1 item
Threaded
  1. Yes 20 items
  2. No 32 items
Twist Rate
  1. 1:9 1 item
  2. 1:10 51 items
  3. 1:16 2 items
Stock Status
  1. In stock 646 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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