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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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  7. Krebs Custom Safety for Kalashnikov USA KP-9 Pistol
    Krebs Custom Safety for Kalashnikov USA KP-9 Pistol
    $62.00
    Out of stock
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  8. Krebs Custom Yugo AMBI Safety
    Krebs Custom Yugo AMBI Safety
    $66.50
    Out of stock
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  9. Aero Precision AR-15 Carbine Buffer Kit
    Aero Precision AR-15 Carbine Buffer Kit
    $67.99
    Out of stock
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  10. Noveske Lo Pro Gas Block .750 2 Screw
    Noveske Lo Pro Gas Block .750 2 Screw
    $61.75
    Out of stock
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  11. V Seven Weapon Systems Endplate / Castle Nut Combo
    V Seven Weapon Systems Endplate / Castle Nut Combo
    $61.11
    Out of stock
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  12. V Seven Weapon Systems Carbine Buffer Tube
    V Seven Weapon Systems Carbine Buffer Tube
    $63.05
    Out of stock
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  13. V Seven Weapon Systems Titanium Barrel Nut for BCM KMR
    V Seven Weapon Systems Titanium Barrel Nut for BCM KMR
    $68.87
    Out of stock
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  16. Hera Arms LC-S Linear Compensator-Small
    Hera Arms LC-S Linear Compensator-Small
    $69.00
    Out of stock
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Items 49-64 of 80

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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 3 items
  2. Parts & Kits 23 items
  3. Barrels 1 item
  4. Buffer Systems 4 items
  5. Trigger Parts 3 items
  6. Gas Systems 5 items
  7. Muzzle Devices 14 items
  8. Bolt Parts 1 item
  9. Grips 8 items
  10. Charging Handles 6 items
  11. Rifle Handguards 3 items
  12. Stocks & Braces 8 items
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  2. .625 DIA 1 item
  3. .750 DIA 3 items
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  2. .750" 1 item
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  11. Black River MFG 1 item
  12. Blitzkrieg Components 1 item
  13. Bravo Company MFG (BCM) 2 items
  14. Daniel Defense 1 item
  15. Faxon Firearms 1 item
  16. Fortis MFG 3 items
  17. Forward Controls Design 7 items
  18. Half Cocked Arms (HCA) 1 item
  19. HB Industries 1 item
  20. HERA ARMS 1 item
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  23. JK Armament 1 item
  24. JL Billet 1 item
  25. Kinetic Development Group 1 item
  26. Knight’s Armament Company (KAC) 1 item
  27. Kaw Valley Precision 1 item
  28. Kratos Design Group 1 item
  29. Krebs Customs 5 items
  30. Lantac 1 item
  31. Magpul Industries 5 items
  32. Mission First Tactical 1 item
  33. Next Level Armament 6 items
  34. Noveske 1 item
  35. Rainier Arms, LLC 3 items
  36. Rainier Industries 2 items
  37. Sig Sauer 1 item
  38. Sons of Liberty Gun Works 2 items
  39. Springer Precision 1 item
  40. Timney Triggers 1 item
  41. Triggertech 1 item
  42. Tyrant Designs 2 items
  43. V Seven Weapon Systems 6 items
Model
  1. CZ Scorpion 3 items
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  8. Serrated 1 item
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  1. AR-10/LR308 3 items
  2. AR-15 2 items
  3. CZ 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 2 items
  3. AR-15 Barrel 1 item
  4. AR-15 Stripped Upper Receiver 2 items
  5. AR-9 Upper Receiver 1 item
  6. Barrel Nut 2 items
  7. Bolt 1 item
  8. Buffer Kit 2 items
  9. Buffer Tube 2 items
  10. Castle Nut / End Plate 1 item
  11. Charging Handle 4 items
  12. Compensator 5 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 5 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. 10" 1 item
  2. 14" 1 item
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  1. Small 1 item
  2. X-Large 1 item
  3. 7 Slot 1 item
Thread Pitch
  1. 1/2x28 (9mm) 4 items
  2. 1/2x28 (.22 cal) 8 items
  3. 1/2x32 4 items
  4. 1/2x36 3 items
  5. 5/8x24 (.30 cal) 1 item
  6. M13.5x1 LH 4 items
Threaded
  1. Yes 1 item
Stock Status
  1. In stock 51 items
  2. Out of stock 29 items
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