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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. True Precision X-Fluted Match Grade Threaded Barrel For Glock 26 - Stainless
    True Precision X-Fluted Match Grade Threaded Barrel For Glock 26 - Stainless
    $170.99
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  2. Agency Arms 417 Single Port Compensator For Glock Gen 3 - Gray
    Agency Arms 417 Single Port Compensator For Glock Gen 3 - Gray
    $100.00
    View Details
  3. 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
    View Details
  4. HB Industries CZ P10 Theta Trigger Kit
    HB Industries CZ P10 Theta Trigger Kit
    As low as $65.00
    View Details
  5. Apex Tactical Specialties S&W M&P M2.0 Flat Faced Forward Set Trigger Kit - Red
    Apex Tactical Specialties S&W M&P M2.0 Flat Faced Forward Set Trigger Kit - Red
    $166.20
    View Details
  6. Dark Hour Defense GSOD - M&P 2.0
    Dark Hour Defense GSOD - M&P 2.0
    $94.09
    View Details
  7. Dark Hour Defense Compensated w/Rail GSOD - M&P 2.0
    Dark Hour Defense Compensated w/Rail GSOD - M&P 2.0
    $103.79
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  8. Agency Arms Drop In Trigger For Glock
    Agency Arms Drop In Trigger For Glock
    As low as $135.00
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  9. Killer Innovations Universal Velocity Magwell For Glock 17/22/31 -
    Killer Innovations Universal Velocity Magwell For Glock 17/22/31 -
    As low as $94.49
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  10. Killer Innovations Universal Velocity Magwell For Glock 19/23/32
    Killer Innovations Universal Velocity Magwell For Glock 19/23/32
    As low as $94.49
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  11. Night Fision Tritium Sight Set For Glock - Square Rear
    Night Fision Tritium Sight Set For Glock - Square Rear
    As low as $97.20
    View Details
  12. Faxon Firearms Sig Sauer P320 Compact Flamed Barrel - Nitride
    Faxon Firearms Sig Sauer P320 Compact Flamed Barrel - Nitride
    $185.25
    View Details
  13. Apex Tactical Specialties Sig P320 Advanced Flat Trigger (Updated)
    Apex Tactical Specialties Sig P320 Advanced Flat Trigger (Updated)
    $47.45
    View Details
  14. Killer Innovations Velocity Thread Protector 1/2×28
    Killer Innovations Velocity Thread Protector 1/2×28
    $14.99
    View Details
  15. Magpul Enhanced Magwell For Glock 19 Gen 4
    Magpul Enhanced Magwell For Glock 19 Gen 4
    $23.70
    View Details
  16. Apex Tactical Specialties M&P M2.0 Shield Action Enhancement Trigger & Duty/Carry Kit - Black
    Apex Tactical Specialties M&P M2.0 Shield Action Enhancement Trigger & Duty/Carry Kit - Black
    $151.95
    View Details
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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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Category
  1. .223 / 5.56 Magazines 7 item
  2. 10-8 Performance 10 item
  3. 7.62 x 51 / .308 Magazines 1 item
  4. ANR Design 1 item
  5. AR-15 .223 / 5.56 Barrels 1 item
  6. AR10 Parts 42 item
  7. AR15 Parts 177 item
  8. ARC Division 7 item
  9. Aeroknox 1 item
  10. Agency Arms 76 item
  11. Align Tactical 1 item
  12. Apex Tactical Specialties 52 item
  13. Apparel 1 item
  14. Armaspec 2 item
  15. Arms Republic 8 item
  16. Ascalon Arms 1 item
  17. BCG's & Parts 6 item
  18. Battle Arms Development 10 item
  19. Bi-Pods 3 item
  20. Blitzkrieg Components 1 item
  21. Bravo Company MFG 1 item
  22. Brügger & Thomet (B&T) 1 item
  23. Buffers 47 item
  24. Buffers, Springs & Extensons 2 item
  25. CAA 17 item
  26. CMC Triggers 11 item
  27. CMT Tactical / Cross Machine Tool 6 item
  28. Centurion Arms 1 item
  29. Charging Handles 5 item
  30. Complete Uppers 1 item
  31. DPM Systems Technologies 18 item
  32. Danger Close Armament 38 item
  33. Dark Hour Defense 6 item
  34. Dead Air Armament 1 item
  35. Devil Dog Concepts 3 item
  36. Elite Tactical Systems (ETS) 1 item
  37. Elzetta Design 1 item
  38. Faction 2 item
  39. Faxon Firearms 41 item
  40. Flashlights & Mounts 3 item
  41. Forearm Systems 17 item
  42. Foregrip 2 item
  43. Fortis Manufacturing (Fortis MFG) 7 item
  44. Forward Controls Design 2 item
  45. Gas Blocks & Tubes 4 item
  46. Glock 5 item
  47. GoGun USA 2 item
  48. Grayguns 26 item
  49. Grey Ghost Precision 40 item
  50. Griffin Armament 14 item
  51. Grips 15 item
  52. Gun Pro 4 item
  53. HB Industries 1 item
  54. Handgun Barrels 14 item
  55. Handgun Magazines 4 item
  56. Handguns 1 item
  57. Heckler & Koch 2 item
  58. Hera Arms 2 item
  59. Hiperfire 1 item
  60. Holsters & Mag Carriers 11 item
  61. IWI 2 item
  62. Icarus Precision 10 item
  63. Iron City Rifle Works 1 item
  64. JP Enterprises 1 item
  65. K Rounds LLC 4 item
  66. KNS Precision 2 item
  67. Kagwerks 2 item
  68. Killer Innovations 51 item
  69. Korth 1 item
  70. Krebs Customs 1 item
  71. Kriss 5 item
  72. L2D Combat 28 item
  73. LWRC International 1 item
  74. Lancer Systems 4 item
  75. Lantac 14 item
  76. Lone Wolf Arms 2 item
  77. Magazine Accessories 5 item
  78. Magpul 9 item
  79. Mirzon 7 item
  80. Mission First Tactical 1 item
  81. Modular Evolution LLC 1 item
  82. Muzzle Devices 15 item
  83. NFA 3 item
  84. Next Level Armament 9 item
  85. Night Fision 32 item
  86. Nighthawk Custom 6 item
  87. Nomad Defense 14 item
  88. Norsso 21 item
  89. Noveske 7 item
  90. Nylon 2 item
  91. ODIN Works 16 item
  92. Okay Industries 4 item
  93. Optics 10 item
  94. Optics, Sights & Mounts 16 item
  95. Other Caliber 8 item
  96. Other Firearms 4 item
  97. Other Lower Parts 55 item
  98. Other firearm Accessories 3 item
  99. Otis Technologies 1 item
  100. Overwatch Precision 11 item
  101. Parts & Kits 12 item
  102. Patriot Ordnance Factory (POF) 4 item
  103. Pioneer CNC 2 item
  104. Pistol Braces/Tubes 1 item
  105. Pistol parts 966 item
  106. Pistols 2 item
  107. Polymer 80 23 item
  108. Primary Arms 4 item
  109. Primary Weapon Systems 4 item
  110. Project GLOCK 3 item
  111. Project Giggles 1 item
  112. Proof Research 1 item
  113. Rainier Arms 49 item
  114. Rainier Arms Barrels 1 item
  115. Receiver Parts 14 item
  116. Recover Tactical 3 item
  117. Replacement Parts - Lower 54 item
  118. Replacement Parts - Upper 6 item
  119. Reptilia Corp 1 item
  120. Rifle Handguards 2 item
  121. Rifles 6 item
  122. Rugged Suppressor 1 item
  123. SB Tactical 1 item
  124. SIG Sauer 33 item
  125. SLR Rifleworks 3 item
  126. Scalarworks 3 item
  127. Sharps Bros 1 item
  128. Shield Arms 1 item
  129. Slings & Mounts 3 item
  130. Smartmag 1 item
  131. Smith & Wesson 1 item
  132. Sprinco (Tactical Springs) 9 item
  133. Springer Precision 16 item
  134. Springs & Extensons 2 item
  135. Stocks 5 item
  136. Stoeger 1 item
  137. Strike Industries 47 item
  138. Stripped Lower Receivers 5 item
  139. Stripped Upper Receivers 6 item
  140. Swag 8 item
  141. Swampfox 2 item
  142. TXC Holsters 5 item
  143. Tactical Link 2 item
  144. Taylor Freelance 6 item
  145. Thumb Safeties 2 item
  146. Timney Triggers 4 item
  147. Toni Systems 12 item
  148. Tools 14 item
  149. Trigger Parts 6 item
  150. Triggertech 1 item
  151. Trijicon 15 item
  152. Trinity Nevada 14 item
  153. True Precision 37 item
  154. Tyrant Designs 45 item
  155. Upper/Lower Combo 5 item
  156. WMD Guns 4 item
  157. Wilson Combat 7 item
  158. Zev Technologies 61 item
Price
  1. Less than $10 35 item
  2. $10 to $25 97 item
  3. $25 to $50 144 item
  4. $50 to $100 249 item
  5. $100 to $250 379 item
  6. $250 to $500 185 item
  7. $500 to $1000 32 item
  8. Greater than $1000 33 item
Manufacturer
  1. 10-8 Performance 10 item
  2. ANR Design 1 item
  3. ARC Division 7 item
  4. Aeroknox 1 item
  5. Agency Arms 76 item
  6. Align Tactical 1 item
  7. Apex Tactical Specialties 51 item
  8. Armaspec 2 item
  9. Arms Republic 8 item
  10. Ascalon Arms 1 item
  11. Battle Arms Development 10 item
  12. Blitzkrieg Components 1 item
  13. Brügger & Thomet (B&T) 1 item
  14. CAA 17 item
  15. CMC Triggers 11 item
  16. Cross Machine Tool (CMT) 5 item
  17. DPM Systems Technologies 18 item
  18. Danger Close Armament 38 item
  19. Dark Hour Defense 6 item
  20. Devil Dog Concepts 3 item
  21. Elite Tactical Systems (ETS) 1 item
  22. Elzetta Design LLC 1 item
  23. Faction 2 item
  24. Faxon Firearms 40 item
  25. Fortis MFG 7 item
  26. Forward Controls Design 2 item
  27. Glock 5 item
  28. GoGun USA 3 item
  29. Grayguns 26 item
  30. Grey Ghost Precision 40 item
  31. Griffin Armament 14 item
  32. Gun Pro 5 item
  33. HERA ARMS 2 item
  34. Heckler & Koch 2 item
  35. Hiperfire 1 item
  36. IWI 2 item
  37. Icarus Precision 10 item
  38. Iron City Rifle Works 1 item
  39. JP Enterprises Inc 1 item
  40. K Rounds LLC 5 item
  41. KNS Precision 3 item
  42. Kagwerks 2 item
  43. Killer Innovations 50 item
  44. Kinetic Development Group 1 item
  45. Korth 1 item
  46. Krebs Customs 1 item
  47. Kriss USA 5 item
  48. L2D Combat 28 item
  49. LWRC International 1 item
  50. Lancer Systems 4 item
  51. Lantac 14 item
  52. Lone Wolf Arms 2 item
  53. Magpul Industries 9 item
  54. Mirzon 7 item
  55. Mission First Tactical 1 item
  56. Modular Evolution LLC 1 item
  57. NIGHT FISION 32 item
  58. Next Level Armament 9 item
  59. Nighthawk Custom 6 item
  60. Nomad Defense 14 item
  61. Norsso 22 item
  62. Noveske 7 item
  63. Odin Works 23 item
  64. Okay Industries 4 item
  65. Otis Technologies 1 item
  66. Overwatch Precision 11 item
  67. Patriot Ordnance Factory (POF) 4 item
  68. Pioneer CNC 2 item
  69. Polymer80 23 item
  70. Primary Arms 4 item
  71. Primary Weapon Systems 4 item
  72. Proof Research 1 item
  73. Rainier Arms, LLC 49 item
  74. Recover Tactical 3 item
  75. Reptilia Corp 1 item
  76. Ruger 1 item
  77. Rugged Suppressor 1 item
  78. SB Tactical 1 item
  79. SCALARWORKS 3 item
  80. SLR Rifleworks 3 item
  81. Seekins Precision 1 item
  82. Sharps Bros 1 item
  83. Shield Arms 1 item
  84. Sig Sauer 33 item
  85. Smartmag 1 item
  86. Smith & Wesson 1 item
  87. Sprinco (Tactical Springs) 9 item
  88. Springer Precision 15 item
  89. Stag Arms 1 item
  90. Stoeger 1 item
  91. Strike Industries 50 item
  92. Swampfox 2 item
  93. TXC Holsters 5 item
  94. Tactical Link 2 item
  95. Taylor Freelance 6 item
  96. Timney Triggers 4 item
  97. Toni Systems 12 item
  98. Triggertech 1 item
  99. Trijicon 15 item
  100. Trinity Nevada 14 item
  101. True Precision 38 item
  102. Tyrant Designs 52 item
  103. WMD Guns 4 item
  104. Wilson Combat 7 item
  105. ZEV Technologies 61 item
Caliber
  1. .22 LR 1 item
  2. .223 Wylde 1 item
  3. .260 Rem 1 item
  4. .308 3 item
  5. .40 S&W 1 item
  6. .45 ACP 7 item
  7. 300BLK 5 item
  8. 5.56 NATO 12 item
  9. 6.5 Creedmoor 1 item
  10. 7.62x51 9 item
  11. 9mm 159 item
Finish
  1. Alpine Multicam 1 item
  2. Aluminum 2 item
  3. Anodize 2 item
  4. Battleworn 2 item
  5. Black 59 item
  6. Black Anodize 1 item
  7. Black DLC 26 item
  8. Black Nickel Teflon 1 item
  9. Black Nitride 8 item
  10. Black Oxide 1 item
  11. Black/Black 7 item
  12. Black/Nickel 6 item
  13. Black/TiN 7 item
  14. Blue 7 item
  15. Bronze 23 item
  16. Cerakote 2 item
  17. Chameleon 12 item
  18. Clear 8 item
  19. Cobalt Grey 2 item
  20. Copper 5 item
  21. DLC 43 item
  22. FDE 7 item
  23. FDE DLC 1 item
  24. Glock FDE 2 item
  25. Gold 15 item
  26. Gold Anodize 1 item
  27. Gold TiN 2 item
  28. Gray 7 item
  29. Grey 9 item
  30. Grey DLC 3 item
  31. Grey/Black Camo 1 item
  32. Grey/Black Digital Camo 1 item
  33. MDC (Gray) 15 item
  34. Melonite 3 item
  35. Metallic Gray 1 item
  36. NeoChromatic 1 item
  37. Nickel Boron 1 item
  38. Nitride 10 item
  39. OD Green 2 item
  40. Orange 3 item
  41. PVD/CVD 3 item
  42. Phosphate 1 item
  43. Polished 1 item
  44. Raw 3 item
  45. Red 11 item
  46. Rose 2 item
  47. Rose Gold TiCN 2 item
  48. Satin 1 item
  49. Sig Grey 2 item
  50. Spectrum 7 item
  51. Stainless Steel 48 item
  52. Stealth Grey 8 item
  53. TIN 8 item
  54. TiN (Gold) 43 item
  55. Titan 1 item
  56. Tungsten 2 item
  57. White 4 item
Option
  1. (Blue) - 15 lbs 2 item
  2. (Green) - 13 lbs 2 item
  3. (Red) - 18 lbs 2 item
  4. 4lb 1 item
  5. 6.5lb 1 item
  6. 6lb 1 item
  7. AR-10 4 item
  8. AR-15 38 item
  9. CZ 28 item
  10. FNH 9 item
  11. Glock 486 item
  12. Glock 17 1 item
  13. Glock 19 1 item
  14. Heckler & Koch 3 item
  15. KS 1 item
  16. Manual Safety 3 item
  17. Multi Cut 3 item
  18. No Safety 3 item
  19. RMR Cut 4 item
  20. Sig Sauer 139 item
  21. Smith & Wesson 31 item
  22. Springfield 13 item
  23. V1 9 item
  24. V2 10 item
  25. V3 6 item
  26. V4 6 item
  27. WA 1 item
  28. Walther 3 item
Configuration
  1. .625 DIA 1 item
  2. .750 DIA 4 item
  3. .875 DIA 2 item
  4. .936 DIA 1 item
  5. 1st - 3rd Gen 2 item
  6. 9mm, .40, .357 1 item
  7. AR-10 1 item
  8. AR-15 7 item
  9. Curved 3 item
  10. Enhanced Finger Placement (EFP) 1 item
  11. Fiber Optic - Mid Height Sights 2 item
  12. Fiber Optic - Suppressor Height Sights 2 item
  13. Flat 2 item
  14. G17 30 item
  15. G19 45 item
  16. G21SF 1 item
  17. G22 1 item
  18. G26 6 item
  19. G34 1 item
  20. G42 1 item
  21. G43 8 item
  22. GEN 4/5 3 item
  23. Gen 1-3 1 item
  24. Gen 3 16 item
  25. Gen 4 16 item
  26. Gen 5 7 item
  27. Glock .40 Cal Gen1-3 1 item
  28. Glock .40 cal Gen4 1 item
  29. Glock 9mm Gen 1-3 1 item
  30. Glock 9mm Gen4 1 item
  31. Glock Gen 5 1 item
  32. Large Backstrap 2 item
  33. M-LOK 10 item
  34. Med Backstrap 2 item
  35. No Backstrap 2 item
  36. P320 14 item
  37. P365 7 item
  38. P365XL 1 item
  39. Right Hand 1 item
  40. Standard 1 item
  41. Straight 2 item
  42. Tritium Stealth Sights 2 item
Stock Status
  1. In Stock 543 item
  2. Out of Stock 643 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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