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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. Geissele Hi-Speed National Match Designated Marksman Rifle (DMR) Trigger
    Geissele Hi-Speed National Match Designated Marksman Rifle (DMR) Trigger
    $284.00
    Out of stock
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  2. Battle Arms Development BAD Billet Dedicated Pistol Caliber Stripped Upper Receiver
    Battle Arms Development BAD Billet Dedicated Pistol Caliber Stripped Upper Receiver
    $239.00
    Out of stock
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  3. Faxon Firearms AR-15 Match Series .223 Wylde 416R Nitride Barrel - 16"
    Faxon Firearms AR-15 Match Series .223 Wylde 416R Nitride Barrel - 16"
    $216.20
    Out of stock
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  4. Triggertech Adaptable AR Trigger - PVD Black
    Triggertech Adaptable AR Trigger - PVD Black
    Out of stock
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  5. Triggertech Competitive AR Trigger
    Triggertech Competitive AR Trigger
    Out of stock
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  6. BATTLE ARMS Development AR-15 RIGIDRAIL M-LOK HANDGUARD
    BATTLE ARMS Development AR-15 RIGIDRAIL M-LOK HANDGUARD
    Out of stock
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  7. Angstadt Arms AR-15 0940 Lower Receiver for Glock
    Angstadt Arms AR-15 0940 Lower Receiver for Glock
    $250.00
    Out of stock
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  8. Faxon Firearms PENCIL .308 WIN, Mid-Length, 4150 QPQ Nitride - 16"
    Faxon Firearms PENCIL .308 WIN, Mid-Length, 4150 QPQ Nitride - 16"
    $238.28
    Out of stock
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  9. Faxon Firearms PENCIL .308 WIN
    Faxon Firearms PENCIL .308 WIN
    Out of stock
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  10. Rainier Arms Ultramatch .308 Billet Upper Receiver MOD 3
    Rainier Arms Ultramatch .308 Billet Upper Receiver MOD 3
    $269.99
    Out of stock
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  11. Ballistic Advantage Premium Series 416R SS 223 Wylde 18" SPR Fluted
    Ballistic Advantage Premium Series 416R SS 223 Wylde 18" SPR Fluted
    $256.50
    Out of stock
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  12. Ballistic Advantage Premium Series 416R SS 223 Wylde 16" Fluted
    Ballistic Advantage Premium Series 416R SS 223 Wylde 16" Fluted
    $237.50
    Out of stock
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  13. Faxon Firearms AR-15 Match Series .223 Wylde, 416R, QPQ, 5R Flame Barrel - 18"
    Faxon Firearms AR-15 Match Series .223 Wylde, 416R, QPQ, 5R Flame Barrel - 18"
    $299.00
    Out of stock
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  14. Hiperfire HIPERTOUCH Auto, AR15/10 M4/M16 Trigger Assembly, Full-auto
    Hiperfire HIPERTOUCH Auto, AR15/10 M4/M16 Trigger Assembly, Full-auto
    $237.50
    Out of stock
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  15. Faxon Firearms 6.5 Grendel 416-R Stainless Gunner Barrel MATCH SERIES - 18"
    Faxon Firearms 6.5 Grendel 416-R Stainless Gunner Barrel MATCH SERIES - 18"
    $234.60
    Out of stock
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  16. Aero Precision AR15 M4E1 RECEIVER SET - BLACK
    Aero Precision AR15 M4E1 RECEIVER SET - BLACK
    $269.98
    Out of stock
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Items 81-96 of 123

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Barrel Length
  1. 3.66" 1 item
  2. 11.5" 1 item
  3. 12.5" 1 item
  4. 14.5" 1 item
  5. 16" 11 items
  6. 18" 5 items
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Caliber
  1. .223/5.56 1 item
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  4. .308 1 item
  5. .308 Win 2 items
  6. .458 Socom 1 item
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  8. 6mm ARC 2 items
  9. 6.5 Grendel 1 item
  10. 7.62mm 1 item
  11. 9mm 1 item
Category
  1. Receiver Parts 28 items
  2. Rifle Barrels 19 items
  3. Trigger Parts 21 items
  4. Muzzle Devices 1 item
  5. Bolt Parts 12 items
  6. Charging Handles 1 item
  7. Rifle Handguards 21 items
  8. Stocks & Braces 20 items
Co Witness
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  1. .750" 6 items
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  2. 1.55" 1 item
Is Firearms?
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  8. Blackout Defense 5 items
  9. Bravo Company MFG (BCM) 3 items
  10. Centurion Arms 3 items
  11. F5 MFG 11 items
  12. Faxon Firearms 15 items
  13. Fortis MFG 1 item
  14. Forward Controls Design 3 items
  15. Geissele 8 items
  16. Griffin Armament 1 item
  17. HB Industries 1 item
  18. Hiperfire 3 items
  19. JMAC Customs 1 item
  20. Knight’s Armament Company (KAC) 4 items
  21. Lantac 2 items
  22. Law Tactical 1 item
  23. Lee Sporting 3 items
  24. Lewis Machine & Tool (LMT) 1 item
  25. Midwest Industries 4 items
  26. Noveske 1 item
  27. Primary Weapon Systems 1 item
  28. Rainier Arms, LLC 7 items
  29. SB Tactical 1 item
  30. Sharps Bros 1 item
  31. Silencerco 1 item
  32. SLR Rifleworks 1 item
  33. Timney Triggers 1 item
  34. Triggertech 3 items
  35. Troy Industries 3 items
  36. V Seven Weapon Systems 1 item
  37. VLTOR 2 items
Model
  1. CZ Bren 1 item
  2. CZ Scorpion 2 items
  3. H&K G36 1 item
  4. Remington 700 1 item
  5. Sig MCX 1 item
Mount
  1. KeyMod 1 item
  2. M-LOK 7 items
  3. Picatinny 6 items
Option
  1. AR-10 6 items
  2. AR-15 25 items
  3. WA 1 item
  4. KS 1 item
  5. CZ 2 items
  6. Glock 1 item
  7. AKM 1 item
  8. Dimpled 1 item
Platform
  1. AR-10 1 item
  2. AR-15 4 items
  3. AK47/74 3 items
  4. CZ-USA 2 items
  5. Remington 1 item
  6. Sig Sauer 1 item
Price
  1. $200.00 - $209.99 15 items
  2. $210.00 - $219.99 13 items
  3. $220.00 - $229.99 8 items
  4. $230.00 - $239.99 19 items
  5. $240.00 - $249.99 15 items
  6. $250.00 - $259.99 11 items
  7. $260.00 - $269.99 12 items
  8. $270.00 - $279.99 8 items
  9. $280.00 - $289.99 6 items
  10. $290.00 and above 16 items
Product Type
  1. AR-10 Handguard 1 item
  2. AR-10 Stripped Lower Receiver 2 items
  3. AR-10 Stripped Upper Receiver 2 items
  4. AR-15 Complete Lower Receiver 4 items
  5. AR-15 Handguard 10 items
  6. AR-15 Receiver Set 1 item
  7. AR-15 Stripped Lower Receiver 3 items
  8. AR-15 Stripped Upper Receiver 8 items
  9. AR-9 Lower Receiver 2 items
  10. AR-9 Upper Receiver 1 item
  11. Barrel 19 items
  12. Bolt Carrier Group 9 items
  13. Brace 2 items
  14. Charging Handle 1 item
  15. Handguard 9 items
  16. Handgun 1 item
  17. Lower Receiver 3 items
  18. Muzzle Brake 1 item
  19. Rail Adapter 1 item
  20. Scope Mount 1 item
  21. Stock 16 items
  22. Stock Accessory 1 item
  23. Trigger 21 items
Rail Length
  1. 7" 1 item
  2. 9" 1 item
  3. 9.6" 1 item
  4. 10" 2 items
  5. 10.75" 1 item
  6. 12" 3 items
  7. 12.5" 1 item
  8. 13" 1 item
  9. 13.5" 1 item
  10. 13.7" 1 item
  11. 14" 1 item
  12. 15" 6 items
Size
  1. 9 Slot 2 items
Thread Pitch
  1. 1/2x28 2 items
  2. 5/8x24 5 items
Twist Rate
  1. 1:7 2 items
Stock Status
  1. Out of stock 123 items Remove This Item
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