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Parts & Kits

At Rainier Arms product selection you can find various rifle parts and kits that will help you build and maintain your firearms. Our selection of rifle parts and kits is carefully curated to ensure that we offer only the best products available.

We work with leading manufacturers on the market including V Seven Weapon Systems, Battle Arms Development, Strike Industries, and more.

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  1. Rainier Arms Ambidextrous Safety Selector Switch - Standard / Short (45 Degree)
    Rainier Arms Ambidextrous Safety Selector Switch - Standard / Short (45 Degree)
    $49.92 - $85.00
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  2. Elftmann Tactical Push Button Ambi Speed Safety
    Elftmann Tactical Push Button Ambi Speed Safety
    $37.95
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  3. Strike Industries AR15 Forward Assist
    Strike Industries AR15 Forward Assist
    $18.95
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  5. Battle Arms Development BAD-EMMR Enhanced MODULAR Magazine Release
    Battle Arms Development BAD-EMMR Enhanced MODULAR Magazine Release
    $19.95 - $21.95
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  8. Rainier Arms EMMR Mag Release
    Rainier Arms EMMR Mag Release
    $21.95
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  10. V Seven Weapon Systems Titanium Pivot / Take Down Pins-DPMS/SR25
    V Seven Weapon Systems Titanium Pivot / Take Down Pins-DPMS/SR25
    $38.80 - $42.68
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  15. Hera Arms AR15 Dust Cover Assembly
    Hera Arms AR15 Dust Cover Assembly
    $9.90
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Items 1-16 of 298

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Shopping Options
Barrel Length
  1. 14.5" 1 item
  2. 16" 3 items
  3. 16.1" 2 items
  4. 16.3" 2 items
  5. 18" 5 items
Caliber
  1. .22 Cal 2 items
  2. .223/5.56 1 item
  3. .30 Cal 3 items
  4. .308 2 items
  5. 300 Blackout 1 item
  6. 5.56 NATO 2 items
  7. 6.5 Grendel 1 item
  8. 6.8 SPC 1 item
  9. 7.62x51 1 item
  10. 9mm 7 items
Category
  1. Lower Parts Kit 28 items
  2. Upper Parts Kit 1 item
  3. Take Down & Pivot Pins 23 items
  4. Forward Assist 14 items
  5. Port Cover | Rod | Springs 27 items
  6. Other Rifle Parts 150 items
  7. Safety Selectors 55 items
Color
Configuration
  1. 90 Degree 1 item
  2. AR-15 8 items
  3. Cross 1 item
  4. Flaming Pig 1 item
  5. Gen 3 1 item
  6. Ghetto Blaster 1 item
  7. M-LOK 2 items
Finish
  1. Black 3 items
  2. DLC 3 items
  3. NiB-X 4 items
  4. Nitromet 6 items
  5. Anodize 5 items
Gas System Length
  1. Pistol 1 item
  2. Mid 1 item
  3. Intermediate 5 items
Height
  1. Absolute Co-Witness 1 item
Is Firearms?
  1. No 298 items
Manufacturer
  1. Aero Precision 6 items
  2. Aeroknox 1 item
  3. ALG Defense 1 item
  4. Angstadt Arms 1 item
  5. Apex Tactical Specialties 4 items
  6. Armaspec 4 items
  7. Arms Republic 1 item
  8. Ascalon Arms 6 items
  9. B5 Systems 1 item
  10. Battle Arms Development 24 items
  11. Bravo Company MFG (BCM) 2 items
  12. Chisel Machining 1 item
  13. Elftmann Tactical 1 item
  14. F-1 Firearms 1 item
  15. Fortis MFG 14 items
  16. Forward Controls Design 37 items
  17. Geissele 6 items
  18. Griffin Armament 2 items
  19. HB Industries 7 items
  20. HERA ARMS 2 items
  21. Heresy Design 6 items
  22. Hiperfire 3 items
  23. HUXWRX 1 item
  24. James Madison Tactical (JMT) 1 item
  25. JK Armament 10 items
  26. JMAC Customs 1 item
  27. JP Enterprises Inc 3 items
  28. Kinetic Development Group 2 items
  29. KNS Precision 8 items
  30. Krebs Customs 5 items
  31. Lantac 3 items
  32. Mad Pig 2 items
  33. Magpul Industries 6 items
  34. NEMO Arms 2 items
  35. Neverwear Springs 1 item
  36. Next Level Armament 4 items
  37. NIGHT FISION 1 item
  38. Noveske 4 items
  39. Odin Works 1 item
  40. Patriot Ordnance Factory (POF) 2 items
  41. Precision Armament 1 item
  42. Primary Weapon Systems 1 item
  43. Q, LLC 1 item
  44. Radian Weapons 1 item
  45. Rainier Arms, LLC 8 items
  46. Rainier Industries 4 items
  47. Rise Armament 1 item
  48. RS Regulate 1 item
  49. Sharps Bros 1 item
  50. Sionics Weapon Systems 1 item
  51. Sons of Liberty Gun Works 2 items
  52. Sprinco (Tactical Springs) 4 items
  53. Springer Precision 1 item
  54. Strike Industries 11 items
  55. Timney Triggers 1 item
  56. Triggertech 1 item
  57. Troy Industries 1 item
  58. TruCalibre 4 items
  59. Tyrant Designs 2 items
  60. Underground Tactical 1 item
  61. V Seven Weapon Systems 31 items
  62. White Label Armory 2 items
  63. WMD Guns 12 items
  64. WOOX 1 item
Model
  1. CZ Bren 1 item
  2. CZ Scorpion 8 items
  3. FNH 509 1 item
  4. Sig MPX 2 items
  5. Springfield Hellcat 1 item
Mount
  1. KeyMod 1 item
  2. Picatinny 10 items
Option
  1. AK-47/74 1 item
  2. AR-10 4 items
  3. AR-15 35 items
  4. Bull's Eye 1 item
  5. Vertical Lines 1 item
  6. Minimal 1 item
  7. White - Standard Power 1 item
  8. Blue - Enhanced Power 1 item
  9. Red - Extra Power 1 item
  10. Orange - Extra Extra Power 1 item
  11. Yellow - Reduced Power 1 item
  12. White/Red - Intermediate Power 1 item
  13. Green - Rifle Length Standard Power 1 item
  14. Remington 700 Short Action BDL 1 item
  15. 1.125-28 TPI 3 Lug/Booster Adaptor 1 item
  16. 1.180-24 TPI 3 Lug/Booster Adaptor 1 item
  17. CZ 5 items
  18. FNH 1 item
  19. Springfield 1 item
  20. Green Laser 1 item
  21. Dimpled 3 items
  22. Serrated 5 items
Platform
  1. AR-10/LR308 1 item
  2. AR-15 18 items
  3. AK47/74 1 item
  4. CZ-USA 8 items
  5. FNH 1 item
  6. Sig Sauer 2 items
  7. Springfield 1 item
Price
  1. $0.00 - $999.99 296 items
  2. $1,000.00 and above 2 items
Product Type
  1. Accessory 3 items
  2. AK Accessories 1 item
  3. Anti Walk Pins 1 item
  4. Barrel Nut 4 items
  5. Bolt 2 items
  6. Bolt Catch 21 items
  7. Builders Kit 1 item
  8. Cam Pin 1 item
  9. Castle Nut 4 items
  10. Castle Nut / End Plate 8 items
  11. Chassis 1 item
  12. Crush Washer 1 item
  13. Dust Cover 15 items
  14. End Cap 9 items
  15. End Plate 11 items
  16. Failure Resistant Extractor 2 items
  17. Forward Assist 12 items
  18. Forward Assist Spring 1 item
  19. Grip Screw 1 item
  20. Gunsmithing Tool 1 item
  21. Lower Parts Kit 25 items
  22. Magazine Button 1 item
  23. Magazine Catch 10 items
  24. Magazine Release 23 items
  25. Magwell 5 items
  26. Muzzle Device Accessory 1 item
  27. Parts Kit 15 items
  28. Patch 1 item
  29. Pistol Part 1 item
  30. Port Door 5 items
  31. Port Door Rod 6 items
  32. Port Door Spring 1 item
  33. Rail Panel 1 item
  34. Retainer Pin 2 items
  35. Roll Pin 1 item
  36. Safety Selector 53 items
  37. Shim Set 3 items
  38. Spring 7 items
  39. Stock Accessory 1 item
  40. Take Down / Pivot Pins 24 items
  41. Trigger / Hammer Pins 1 item
  42. Upper Parts Kit 1 item
Rail Length
  1. 10" 1 item
  2. 12" 6 items
  3. 15" 1 item
Size
  1. Medium 1 item
  2. Large 1 item
  3. 9 Slot 6 items
Thread Pitch
  1. 1/2x28 7 items
  2. 5/8x24 4 items
  3. M13.5x1 LH 1 item
Threaded
  1. Yes 5 items
Twist Rate
  1. 1:8 2 items
  2. 1:10 3 items
Stock Status
  1. In stock 227 items
  2. Out of stock 71 items
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