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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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  1. Midwest Industries Alpha Series Folding Stock
    Midwest Industries Alpha Series Folding Stock
    $274.95
    Out of stock
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  3. F5 MFG Modular Stock System for CZ Scorpion
    F5 MFG Modular Stock System for CZ Scorpion
    Out of stock
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  5. F5 MFG Modular Stock System for B&T APC9
    F5 MFG Modular Stock System for B&T APC9
    Out of stock
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  6. F5 MFG Modular Stock System for H&K MP5
    F5 MFG Modular Stock System for H&K MP5
    Out of stock
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  8. F5 MFG Modular Stock System for H&K MP5 .22LR
    F5 MFG Modular Stock System for H&K MP5 .22LR
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  9. F5 MFG Modular Stock System for FN Scar
    F5 MFG Modular Stock System for FN Scar
    Out of stock
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  12. Lewis Machine & Tool (LMT) Sopmod Buttstock - Black
    Lewis Machine & Tool (LMT) Sopmod Buttstock - Black
    $205.20
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  15. Bravo Company MFG (BCM) Raider M10 M-LOK Handguard - 10"
    Bravo Company MFG (BCM) Raider M10 M-LOK Handguard - 10"
    $239.00
    Out of stock
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  16. Radian Weapons Vertex Trigger - Flat Bow
    Radian Weapons Vertex Trigger - Flat Bow
    $229.95
    Out of stock
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Items 97-112 of 139

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Barrel Length
  1. 10.3" 1 item
  2. 10.5" 1 item
  3. 11.5" 1 item
  4. 12" 2 items
  5. 13.7" 1 item
  6. 14.5" 1 item
  7. 16" 13 items
  8. 16.1" 1 item
  9. 18" 3 items
  10. 20" 3 items
Barrel Profile
  1. DMR 2 items
  2. MK12 SPR 3 items
Caliber
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  2. .30-30 1 item
  3. .308 2 items
  4. .308 Win 3 items
  5. .458 Socom 1 item
  6. 5.56X45 1 item
  7. 5.56 NATO 10 items
  8. 6mm ARC 6 items
  9. 7.62mm 1 item
  10. 8.6 Blackout 1 item
  11. 9mm 2 items
Category
  1. Receiver Parts 30 items
  2. Barrels 26 items
  3. Trigger Parts 22 items
  4. Muzzle Devices 3 items
  5. Bolt Parts 16 items
  6. Charging Handles 1 item
  7. Rifle Handguards 22 items
  8. Stocks & Braces 18 items
Co Witness
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  3. .875" 2 items
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  4. Mid 12 items
  5. Rifle 5 items
Inside Diameter
  1. 1.34" 1 item
  2. 1.55" 1 item
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  1. A3 Tactical 3 items
  2. Aero Precision 13 items
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  5. Brügger & Thomet (B&T) 1 item
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  9. Bravo Company MFG (BCM) 4 items
  10. Centurion Arms 2 items
  11. Daniel Defense 1 item
  12. F5 MFG 9 items
  13. Faxon Firearms 10 items
  14. Fortis MFG 1 item
  15. Forward Controls Design 1 item
  16. Geissele 5 items
  17. Hiperfire 3 items
  18. JMAC Customs 1 item
  19. JP Enterprises Inc 1 item
  20. Knight’s Armament Company (KAC) 4 items
  21. Lantac 3 items
  22. Law Tactical 2 items
  23. Lee Sporting 4 items
  24. Lewis Machine & Tool (LMT) 2 items
  25. Midwest Industries 4 items
  26. Next Level Armament 1 item
  27. Noveske 4 items
  28. Primary Weapon Systems 1 item
  29. Q, LLC 1 item
  30. Radian Weapons 1 item
  31. Rainier Arms, LLC 9 items
  32. Rise Armament 2 items
  33. SB Tactical 1 item
  34. Sharps Bros 3 items
  35. Silencerco 2 items
  36. SLR Rifleworks 1 item
  37. Sons of Liberty Gun Works 1 item
  38. Surefire 1 item
  39. Timney Triggers 3 items
  40. Triggertech 1 item
  41. Troy Industries 3 items
  42. V Seven Weapon Systems 1 item
  43. VKTR Industries 3 items
  44. VLTOR 1 item
  45. WMD Guns 1 item
Model
  1. CZ Scorpion 1 item
  2. Remington 700 2 items
  3. Sig MCX 1 item
Mount
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  2. M-LOK 12 items
  3. Picatinny 5 items
Option
  1. AR-10 9 items
  2. AR-15 27 items
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  7. IWI Uzi Pro 1 item
Platform
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  2. AR-15 31 items
  3. AK47/74 3 items
  4. CZ 1 item
  5. Remington 2 items
  6. Sig Sauer 1 item
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  1. $200.00 - $209.99 17 items
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  3. $220.00 - $229.99 10 items
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  5. $240.00 - $249.99 13 items
  6. $250.00 - $259.99 11 items
  7. $260.00 - $269.99 13 items
  8. $270.00 - $279.99 12 items
  9. $280.00 - $289.99 8 items
  10. $290.00 and above 23 items
Product Type
  1. AR-10/LR308 Barrel 4 items
  2. AR-10 Handguard 2 items
  3. AR-10 Stripped Lower Receiver 3 items
  4. AR-10 Stripped Upper Receiver 2 items
  5. AR-15 Barrel 22 items
  6. AR-15 Complete Lower Receiver 6 items
  7. AR-15 Handguard 12 items
  8. AR-15 Receiver Set 1 item
  9. AR-15 Stripped Lower Receiver 4 items
  10. AR-15 Stripped Upper Receiver 6 items
  11. AR-9 Lower Receiver 2 items
  12. AR-9 Upper Receiver 1 item
  13. Blast Shield 1 item
  14. Bolt 1 item
  15. Bolt Carrier Group 13 items
  16. Brace 2 items
  17. Charging Handle 1 item
  18. Handguard 7 items
  19. Handgun 1 item
  20. Lower Receiver 4 items
  21. Muzzle Brake 1 item
  22. Muzzle Device Accessory 2 items
  23. Rail Adapter 1 item
  24. Scope Mount 1 item
  25. Stock 13 items
  26. Stock Accessory 2 items
  27. Trigger 22 items
Rail Length
  1. 7" 2 items
  2. 7.2" 1 item
  3. 9" 1 item
  4. 9.6" 1 item
  5. 10" 3 items
  6. 10.75" 1 item
  7. 11.1" 1 item
  8. 12" 1 item
  9. 12.5" 1 item
  10. 13" 1 item
  11. 13.5" 1 item
  12. 13.7" 1 item
  13. 14" 1 item
  14. 15" 8 items
Size
  1. 9 Slot 1 item
Thread Pitch
  1. 1.375-24 1 item
  2. 1/2x28 (9mm) 1 item
  3. 1/2x28 (.22 cal) 14 items
  4. 5/8x24 (.30 cal) 8 items
  5. 11/16x24 1 item
  6. M18x1.5 1 item
Twist Rate
  1. 1:3 1 item
  2. 1:7 13 items
  3. 1:8 5 items
  4. 1:10 5 items
  5. 1:14 1 item
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