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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.

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  4. Shalotek Sig P320F IC Slide RMR Cut - Warden
    Shalotek Sig P320F IC Slide RMR Cut - Warden
    $380.00
    Out of stock
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  9. Noveske DM Slide For Glock 19 Gen 5
    Noveske DM Slide For Glock 19 Gen 5
    $543.75
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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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  43. Lantac 18 items
  44. Laugo Arms 1 item
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  48. Midwest Industries 1 item
  49. Mirzon 3 items
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  52. Next Level Armament 1 item
  53. NIGHT FISION 26 items
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  56. Norsso 26 items
  57. Noveske 6 items
  58. Obsidian Arms 2 items
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  60. Polymer80 3 items
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  62. Rainier Arms, LLC 12 items
  63. Rainier Industries 1 item
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  81. Taran Tactical Innovations 18 items
  82. The Gun Co. 1 item
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  6. $500.00 - $599.99 5 items
  7. $600.00 - $699.99 13 items
  8. $700.00 - $799.99 4 items
  9. $800.00 and above 4 items
Product Type
  1. Accessory 8 items
  2. Adapter Plate 1 item
  3. BackPack 1 item
  4. Backplate 3 items
  5. Barrel 3 items
  6. Basepad 11 items
  7. Bipod Mount 1 item
  8. Bolt Catch 1 item
  9. Charging Handle 5 items
  10. Compensator 53 items
  11. Connector 1 item
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  15. Firing Pin 2 items
  16. Flashlight Accessory 1 item
  17. Grip Accessory 10 items
  18. Grip Module 48 items
  19. Guide Rod 35 items
  20. Handguard 1 item
  21. Handgun Barrel 144 items
  22. Handgun Grip 5 items
  23. Handgun Sights 25 items
  24. Holster 1 item
  25. Iron Sight 2 items
  26. Knife 1 item
  27. Laser 2 items
  28. Locking Block 3 items
  29. Magazine 8 items
  30. Magazine Accessory 1 item
  31. Magazine Catch 3 items
  32. Magazine Extension 7 items
  33. Magazine Release 24 items
  34. Magwell 52 items
  35. Muzzle Device Accessory 2 items
  36. Optic Plate 6 items
  37. Parts Kit 8 items
  38. Pistol Accessory 11 items
  39. Pistol Frame 39 items
  40. Pistol Grip 1 item
  41. Pistol Part 53 items
  42. Pistol Sights 18 items
  43. Rear Sight 1 item
  44. Recoil Spring 57 items
  45. Red Dot Mount 1 item
  46. Safety Selector 2 items
  47. Sight Post 3 items
  48. Sled Feet 1 item
  49. Slide 121 items
  50. Slide Parts Kit 6 items
  51. Slide Plate 7 items
  52. Spring 7 items
  53. Stabilizer Kit 4 items
  54. Take Down / Pivot Pins 1 item
  55. Thumb Rest 5 items
  56. Top Cover 1 item
  57. Trigger 89 items
  58. Upper Parts Kit 2 items
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  2. Medium 1 item
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  5. 5 Slot 1 item
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  9. Sub-Compact 1 item
  10. Compact 10 items
  11. Carry 1 item
  12. Full 6 items
Thread Pitch
  1. 1/2x28 (9mm) 94 items
  2. M13.5x1 LH 1 item
Threaded
  1. Yes 11 items
  2. No 19 items
Twist Rate
  1. 1:10 97 items
  2. 1:16 3 items
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  1. In stock 658 items
  2. Out of stock 263 items
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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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