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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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  2. Rainier Arms Rifle Conversion Kit
    Rainier Arms Rifle Conversion Kit
    Special Price $378.00 Regular Price $504.00
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Shopping Options
Barrel Length
  1. 16" 2 items
  2. 18" 5 items
Caliber
  1. .22 Cal 1 item
  2. .223/5.56 1 item
  3. .30 Cal 2 items
  4. .308 2 items
  5. 6.5 Grendel 1 item
  6. 6.8 SPC 1 item
  7. 7.62x51 1 item
  8. 9mm 3 items
Category
  1. Lower Parts Kit 19 items
  2. Upper Parts Kit 2 items
  3. Take Down & Pivot Pins 20 items
  4. Forward Assist 12 items
  5. Port Cover | Rod | Springs 26 items
  6. Other Rifle Parts 146 items
  7. Safety Selectors 46 items
Color
Configuration
  1. 90 Degree 1 item
  2. AR-15 6 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
  8. AKM 1 item
  9. AKSU 1 item
Finish
  1. DLC 3 items
  2. NiB-X 4 items
  3. Nitromet 6 items
  4. Anodize 5 items
Gas System
  1. Pistol 1 item
  2. Mid 1 item
  3. Intermediate 5 items
Height
  1. Absolute Co-Witness 1 item
Manufacturer
  1. ALG Defense 1 item
  2. Angstadt Arms 1 item
  3. Annex Defense 1 item
  4. Apex Tactical Specialties 3 items
  5. Ascalon Arms 5 items
  6. Atrius 3 items
  7. Badger Ordnance 2 items
  8. B5 Systems 1 item
  9. Battle Arms Development 5 items
  10. Bravo Company MFG (BCM) 2 items
  11. Chisel Machining 1 item
  12. Driven Arms Co. 4 items
  13. Eartune 1 item
  14. F-1 Firearms 1 item
  15. Fortis MFG 14 items
  16. Forward Controls Design 39 items
  17. Geissele 6 items
  18. Griffin Armament 2 items
  19. HB Industries 7 items
  20. Heresy Design 1 item
  21. Hiperfire 3 items
  22. HRF Concepts 5 items
  23. HUXWRX 1 item
  24. James Madison Tactical (JMT) 1 item
  25. JK Armament 7 items
  26. JMAC Customs 3 items
  27. JP Enterprises Inc 3 items
  28. Kinetic Development Group 2 items
  29. KNS Precision 8 items
  30. Krebs Customs 5 items
  31. Lantac 1 item
  32. Mad Pig 2 items
  33. Magpul Industries 6 items
  34. Midwest Industries 5 items
  35. NEMO Arms 1 item
  36. Neverwear Springs 1 item
  37. Next Level Armament 4 items
  38. NIGHT FISION 1 item
  39. Noveske 3 items
  40. Odin Works 1 item
  41. Patriot Ordnance Factory (POF) 2 items
  42. Precision Armament 1 item
  43. Primary Weapon Systems 1 item
  44. Q, LLC 1 item
  45. Radian Weapons 2 items
  46. Rainier Arms, LLC 6 items
  47. Rainier Industries 4 items
  48. Rise Armament 4 items
  49. ROAM Rifles 4 items
  50. RS Regulate 1 item
  51. Sionics Weapon Systems 1 item
  52. Sons of Liberty Gun Works 2 items
  53. Sprinco (Tactical Springs) 4 items
  54. Springer Precision 1 item
  55. Strike Industries 6 items
  56. Timney Triggers 1 item
  57. Triggertech 1 item
  58. Troy Industries 1 item
  59. True Precision 2 items
  60. Tyrant Designs 2 items
  61. V Seven Weapon Systems 32 items
  62. White Label Armory 1 item
  63. WMD Guns 12 items
  64. WOOX 1 item
Model
  1. CZ Bren 1 item
  2. CZ Scorpion 7 items
  3. FNH 509 1 item
  4. H&K MP5K 1 item
  5. LMT MARS-H 1 item
  6. LMT MARS-L 1 item
  7. LWRC IC 1 item
  8. Radian ADAC 1 item
  9. Sig MPX 3 items
  10. Springfield Hellcat 1 item
Mount
  1. KeyMod 1 item
  2. Picatinny 6 items
Option
  1. AK-47/74 2 items
  2. AR-10 2 items
  3. AR-15 23 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 4 items
  18. FNH 1 item
  19. Springfield 1 item
  20. Dimpled 3 items
  21. Serrated 5 items
Platform
  1. 10-22 2 items
  2. AR-10/LR308 1 item
  3. AR-15 26 items
  4. AK47/74 2 items
  5. CZ 7 items
  6. FNH 1 item
  7. H&K 1 item
  8. Sig Sauer 2 items
  9. Springfield 1 item
Price
  1. $0.00 - $99.99 249 items
  2. $100.00 - $199.99 15 items
  3. $200.00 - $299.99 2 items
  4. $300.00 - $399.99 2 items
  5. $400.00 - $499.99 1 item
  6. $500.00 - $599.99 1 item
  7. $800.00 and above 4 items
Product Type
  1. 10/22 Receiver 1 item
  2. Accessory 3 items
  3. AK Accessories 1 item
  4. Anti Walk Pins 1 item
  5. Barrel Nut 4 items
  6. Bolt 3 items
  7. Bolt Catch 18 items
  8. Buffer 1 item
  9. Builders Kit 1 item
  10. Cam Pin 1 item
  11. Castle Nut 4 items
  12. Castle Nut / End Plate 5 items
  13. Chassis 1 item
  14. Crush Washer 1 item
  15. Dust Cover 15 items
  16. End Cap 6 items
  17. End Plate 13 items
  18. Failure Resistant Extractor 2 items
  19. Forward Assist 10 items
  20. Forward Assist Spring 1 item
  21. Grip Screw 1 item
  22. Gunsmithing Tool 1 item
  23. Handguard 2 items
  24. Lower Parts Kit 16 items
  25. Magazine Button 1 item
  26. Magazine Catch 8 items
  27. Magazine Release 20 items
  28. Magwell 16 items
  29. Muzzle Device Accessory 1 item
  30. Parts Kit 12 items
  31. Patch 1 item
  32. Pistol Part 1 item
  33. Port Door 5 items
  34. Port Door Rod 6 items
  35. Port Door Spring 1 item
  36. Retainer Pin 2 items
  37. Roll Pin 1 item
  38. Safety Selector 45 items
  39. Shim Set 3 items
  40. Spring 8 items
  41. Stock Accessory 1 item
  42. Take Down / Pivot Pins 20 items
  43. Trigger / Hammer Pins 1 item
  44. Upper Parts Kit 2 items
Rail Length
  1. 10" 1 item
  2. 12" 6 items
Size
  1. Medium 1 item
  2. Large 1 item
  3. 9 Slot 6 items
Thread Pitch
  1. 1/2x28 (.22 cal) 2 items
  2. 5/8x24 (.30 cal) 3 items
  3. M13.5x1 LH 1 item
Stock Status
  1. In stock 176 items
  2. Out of stock 98 items
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