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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. Milspec/GI Upper Parts Kit - .308
    Milspec/GI Upper Parts Kit - .308
    $14.99
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  2. Battle Arms Development - EMR Enhanced Magazine Release Red
    Battle Arms Development - EMR Enhanced Magazine Release Red
    $6.75
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  3. V Seven Weapon Systems Hybrid 3 Gun / Sport Selectors 57 Degree Ambi
    V Seven Weapon Systems Hybrid 3 Gun / Sport Selectors 57 Degree Ambi
    $75.66
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  4. Strike industries Extended Pivot / Takedown Pins
    Strike industries Extended Pivot / Takedown Pins
    $14.95
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  5. Strike Industries AR Enhanced UDC Ultimate Dust Cover 223
    Strike Industries AR Enhanced UDC Ultimate Dust Cover 223
    $14.95
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  6. Strike Industries Enhanced Bolt Catch
    Strike Industries Enhanced Bolt Catch
    $14.95
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  7. Seekins Precision Safety Selector Kit
    Seekins Precision Safety Selector Kit
    $37.99
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  8. Strike Industries AR Enhanced Castle Nut & Extended End Plate
    Strike Industries AR Enhanced Castle Nut & Extended End Plate
    $53.95 - $59.95
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  9. Geissele AR-15 Maritime Bolt Catch
    Geissele AR-15 Maritime Bolt Catch
    $29.00
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  10. Strike Industries Ultra Light Pivot / Takedown Pins - Black
    Strike Industries Ultra Light Pivot / Takedown Pins - Black
    $14.95
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  11. Forward Controls Design .308/7.62 ABC/R Augmented Bolt Catch/Release – Serrated
    Forward Controls Design .308/7.62 ABC/R Augmented Bolt Catch/Release – Serrated
    $58.90
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  12. V Seven Weapon Systems Ultra-Light S7 AR-15 Bolt Catch
    V Seven Weapon Systems Ultra-Light S7 AR-15 Bolt Catch
    $27.16
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  13. Battle Arms Development Enhanced Bolt Catch - Investment Cast
    Battle Arms Development Enhanced Bolt Catch - Investment Cast
    $13.95
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  14. Strike Industries AR-15 SHIFT PINS - Black
    Strike Industries AR-15 SHIFT PINS - Black
    $21.95
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  15. Strike Industries Multi-Function End Plate and Anti-Rotation Castle Nut
    Strike Industries Multi-Function End Plate and Anti-Rotation Castle Nut
    $34.95
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  16. Lantac TAKE DOWN PIN SET - ENHANCED
    Lantac TAKE DOWN PIN SET - ENHANCED
    $32.99
    View Details
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Items 1-16 of 344

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Shop By
Shopping Options
Category
  1. Forward Assist 13 item
  2. Lower Parts Kit 33 item
  3. Other Rifle Parts 169 item
  4. Port Cover | Rod | Springs 32 item
  5. Safety Selectors 63 item
  6. Take Down & Pivot Pins 31 item
  7. Upper Parts Kit 3 item
Price
  1. Less than $10 19 item
  2. $10 to $25 95 item
  3. $25 to $50 117 item
  4. $50 to $100 95 item
  5. $100 to $250 10 item
  6. $250 to $500 1 item
  7. $500 to $1000 2 item
Manufacturer
  1. ALG Defense 1 item
  2. Aero Precision 6 item
  3. Aeroknox 1 item
  4. Angstadt Arms 1 item
  5. Apex Tactical Specialties 4 item
  6. Armaspec 5 item
  7. Arms Republic 1 item
  8. Ascalon Arms 6 item
  9. B5 Systems 1 item
  10. Battle Arms Development 34 item
  11. Bravo Company MFG (BCM) 2 item
  12. Chisel Machining 1 item
  13. Cobalt Kinetics 1 item
  14. Elftmann Tactical 3 item
  15. F-1 Firearms 2 item
  16. Fortis MFG 15 item
  17. Forward Controls Design 33 item
  18. Gear Head Works 2 item
  19. Geissele 5 item
  20. Griffin Armament 2 item
  21. HB Industries 3 item
  22. HERA ARMS 2 item
  23. Hiperfire 2 item
  24. JK Armament 12 item
  25. JMAC Customs 1 item
  26. JP Enterprises Inc 3 item
  27. James Madison Tactical (JMT) 1 item
  28. KNS Precision 11 item
  29. Kinetic Development Group 2 item
  30. Krebs Customs 5 item
  31. Lancer Systems 1 item
  32. Lantac 4 item
  33. Magpul Industries 9 item
  34. NEMO Arms 1 item
  35. NIGHT FISION 1 item
  36. Neverwear Springs 1 item
  37. Next Level Armament 1 item
  38. Noveske 3 item
  39. Odin Works 3 item
  40. Patriot Ordnance Factory (POF) 1 item
  41. Phase 5 Tactical 3 item
  42. Pioneer CNC 2 item
  43. Primary Weapon Systems 1 item
  44. RS Regulate 1 item
  45. Radian Weapons 3 item
  46. Rainier Arms, LLC 13 item
  47. Rainier Industries 4 item
  48. Rise Armament 1 item
  49. Schmeisser 1 item
  50. Seekins Precision 3 item
  51. Sharps Bros 1 item
  52. Silencerco 1 item
  53. Sionics Weapon Systems 1 item
  54. Sons of Liberty Gun Works 2 item
  55. Sprinco (Tactical Springs) 4 item
  56. Springer Precision 1 item
  57. Stag Arms 2 item
  58. Strike Industries 30 item
  59. Timney Triggers 1 item
  60. Torrent Suppressors 1 item
  61. Triggertech 1 item
  62. Troy Industries 1 item
  63. TruCalibre 4 item
  64. Tyrant Designs 2 item
  65. Underground Tactical 2 item
  66. V Seven Weapon Systems 37 item
  67. WMD Guns 14 item
  68. WOOX 1 item
  69. White Label Armory 2 item
Caliber
  1. .22 Cal 2 item
  2. .223/5.56 1 item
  3. .30 Cal 3 item
  4. .308 1 item
  5. 6.5 Grendel 1 item
  6. 6.8 SPC 1 item
  7. 7.62x51 1 item
  8. 9mm 6 item
Finish
  1. Anodize 4 item
  2. Black 5 item
  3. Chrome 1 item
  4. DLC 3 item
  5. FDE 1 item
  6. NiB-X 6 item
  7. Nitromet 6 item
  8. Phosphate 2 item
Option
  1. 1.125-28 TPI 3 Lug/Booster Adaptor 1 item
  2. 1.180-24 TPI 3 Lug/Booster Adaptor 1 item
  3. AR-10 11 item
  4. AR-15 38 item
  5. Blue - Enhanced Power 1 item
  6. Bull's Eye 1 item
  7. CZ 7 item
  8. FNH 1 item
  9. Green - Rifle Length Standard Power 1 item
  10. Green Laser 1 item
  11. Minimal 1 item
  12. Orange - Extra Extra Power 1 item
  13. Pistol 1 item
  14. Red - Extra Power 1 item
  15. Remington 700 Short Action BDL 1 item
  16. Rifle 1 item
  17. Springfield 1 item
  18. Vertical Lines 1 item
  19. White - Standard Power 1 item
  20. White/Red - Intermediate Power 1 item
  21. Yellow - Reduced Power 1 item
Configuration
  1. AR-15 13 item
  2. Cross 1 item
  3. Flaming Pig 1 item
  4. Gen 3 1 item
  5. Ghetto Blaster 1 item
  6. M-LOK 1 item
Stock Status
  1. In Stock 255 item
  2. Out of Stock 89 item
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