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Rifle Parts

Whether you're building a new rifle from scratch or looking to upgrade an existing firearm, our vast selection of rifle parts has everything you are going to need in that journey. At Rainier Arms' selection of rifle parts, you can find a wide variety of products including lower and upper parts, trigger parts, muzzle devices, and many more. 

Explore our selection of high-quality parts coming from various leading manufacturers like Strike Industries, Magpul, BCM, and many more.

Also, don't forget to check our specially-made Rainier Arms barrels for your firearms.

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  3. Fortis MFG Hammer .308/7.62 Charging Handle
    Fortis MFG Hammer .308/7.62 Charging Handle
    $61.70
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  4. Bravo Company MFG (BCM) SOPMOD Stock Mod 2 Widebody
    Bravo Company MFG (BCM) SOPMOD Stock Mod 2 Widebody
    $67.95
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  15. Magpul MOE Rifle Stock
    Magpul MOE Rifle Stock
    $66.45
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Items 17-32 of 78

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Barrel Length
  1. 4.5" 1 item
  2. 16" 2 items
Caliber
  1. .223/5.56 3 items
  2. .30 Cal 1 item
  3. 5.56 NATO 1 item
  4. 6.5 Grendel 1 item
  5. 7.62mm 1 item
  6. 9mm 2 items
Category
  1. Receiver Parts 1 item
  2. Parts & Kits 24 items
  3. Rifle Barrels 1 item
  4. Buffer Systems 3 items
  5. Trigger Parts 3 items
  6. Gas Systems 6 items
  7. Muzzle Devices 13 items
  8. Bolt Parts 1 item
  9. Grips 8 items
  10. Charging Handles 5 items
  11. Rifle Handguards 4 items
  12. Stocks & Braces 8 items
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Configuration
  1. AR-15 3 items
  2. .625 DIA 1 item
  3. .750 DIA 3 items
Finish
  1. Black 1 item
  2. Nitride 1 item
  3. Phosphate 1 item
  4. Anodize 1 item
Gas Block Diameter
  1. .625" 2 items
  2. .750" 1 item
Gas Length
  1. Mid 2 items
Height
  1. Absolute Co-Witness 1 item
Inside Diameter
  1. 1.35" 1 item
Is Firearms?
  1. No 78 items
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  1. A3 Tactical 2 items
  2. Aero Precision 1 item
  3. Aeroknox 1 item
  4. ALG Defense 1 item
  5. Apex Tactical Specialties 1 item
  6. Armaspec 2 items
  7. Arms Republic 2 items
  8. Ascalon Arms 3 items
  9. Battle Arms Development 2 items
  10. Black River MFG 1 item
  11. Blitzkrieg Components 1 item
  12. Bravo Company MFG (BCM) 2 items
  13. Daniel Defense 1 item
  14. Faxon Firearms 1 item
  15. Fortis MFG 3 items
  16. Forward Controls Design 7 items
  17. Half Cocked Arms (HCA) 1 item
  18. HERA ARMS 1 item
  19. Heresy Design 1 item
  20. JK Armament 1 item
  21. Kinetic Development Group 1 item
  22. Knight’s Armament Company (KAC) 1 item
  23. Kaw Valley Precision 1 item
  24. Kratos Design Group 1 item
  25. Krebs Customs 5 items
  26. Lantac 1 item
  27. LUTH-AR 1 item
  28. Magpul Industries 4 items
  29. Mission First Tactical 1 item
  30. Next Level Armament 6 items
  31. Noveske 2 items
  32. Rainier Arms, LLC 2 items
  33. Rainier Industries 2 items
  34. Sig Sauer 1 item
  35. Sons of Liberty Gun Works 2 items
  36. Springer Precision 1 item
  37. Strike Industries 1 item
  38. Timney Triggers 1 item
  39. Triggertech 1 item
  40. Tyrant Designs 2 items
  41. V Seven Weapon Systems 6 items
Model
  1. CZ Scorpion 3 items
  2. Sig MPX 1 item
  3. Springfield Hellcat 1 item
Mount
  1. KeyMod 1 item
  2. M-LOK 5 items
  3. Picatinny 1 item
Option
  1. AR-10 2 items
  2. AR-15 7 items
  3. 9mm 1 item
  4. Springfield 1 item
  5. Non-Adjustable 5 items
  6. Serrated 1 item
Platform
  1. AR-10 2 items
  2. AR-15 2 items
  3. CZ-USA 3 items
  4. Sig Sauer 1 item
  5. Springfield 1 item
Product Type
  1. Angled Grip 4 items
  2. AR-10 / LR 308 Charging Handle 1 item
  3. AR-15 Handguard 1 item
  4. AR-15 Stripped Upper Receiver 1 item
  5. Barrel 1 item
  6. Barrel Nut 2 items
  7. Bolt 1 item
  8. Buffer Kit 1 item
  9. Buffer Tube 2 items
  10. Castle Nut / End Plate 1 item
  11. Charging Handle 4 items
  12. Compensator 4 items
  13. Dust Cover 1 item
  14. End Cap 1 item
  15. End Plate 1 item
  16. Failure Resistant Extractor 1 item
  17. Flash Hider 4 items
  18. Forearm Accesory 1 item
  19. Gas Block 6 items
  20. Handstop 3 items
  21. Lower Parts Kit 2 items
  22. Magazine Release 3 items
  23. Magwell 2 items
  24. Muzzle Brake 5 items
  25. Rail Panel 1 item
  26. Safety Selector 10 items
  27. Sight Post 1 item
  28. Sling Mount 1 item
  29. Stock 7 items
  30. Trigger 3 items
  31. Vertical Grip 1 item
Rail Length
  1. 7" 1 item
  2. 9.25" 1 item
  3. 10" 1 item
  4. 14" 1 item
  5. 15" 1 item
Size
  1. Small 1 item
  2. X-Large 1 item
  3. 7 Slot 1 item
Thread Pitch
  1. 1/2x28 11 items
  2. 1/2x32 4 items
  3. 1/2x36 3 items
  4. 5/8x24 1 item
  5. M13.5x1 LH 4 items
Threaded
  1. Yes 1 item
Stock Status
  1. In stock 61 items
  2. Out of stock 17 items
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