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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. Thread Pitch 1/2x28 (.22 cal) Remove This Item
  2. Platform AR-15 Remove This Item
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Barrel Length
  1. 6.75" 1 item
  2. 7.5" 3 items
  3. 7.75" 1 item
  4. 8" 1 item
  5. 8.5" 1 item
  6. 10.3" 1 item
  7. 10.5" 17 items
  8. 11.5" 6 items
  9. 12.3" 1 item
  10. 12.5" 7 items
  11. 13.7" 6 items
  12. 13.9" 3 items
  13. 14.5" 15 items
  14. 16" 20 items
  15. 16.1" 2 items
  16. 18" 13 items
  17. 20" 3 items
Barrel Profile
  1. Lightweight 13 items
  2. M16A1 1 item
  3. MK12 SPR 5 items
Caliber
  1. .22 ARC 1 item
  2. .223 Wylde 34 items
  3. 5.56 NATO 63 items
  4. 5.56mm 2 items
Category
  1. Receiver Parts 8 items
  2. Barrels 90 items
  3. Muzzle Devices 2 items
Color
Finish
  1. Black 1 item
  2. Carbon Fiber 2 items
  3. Nitride 30 items
  4. Polished 4 items
  5. Satin 16 items
Gas Block Diameter
  1. .625" 19 items
  2. .750" 71 items
  3. .936" 2 items
Gas System Length
  1. Pistol 6 items
  2. Carbine 25 items
  3. Mid 48 items
  4. Intermediate 1 item
  5. Rifle 16 items
Manufacturer
  1. Andro Corp Industries 1 item
  2. Ballistic Advantage 8 items
  3. Boss Barrels 2 items
  4. Bravo Company MFG (BCM) 2 items
  5. Centurion Arms 1 item
  6. Christensen Arms 2 items
  7. Daniel Defense 2 items
  8. Faxon Firearms 12 items
  9. Geissele 4 items
  10. NEMO Arms 1 item
  11. Noveske 11 items
  12. Rainier Arms, LLC 43 items
  13. Rise Armament 1 item
  14. Sons of Liberty Gun Works 10 items
Mount
  1. M-LOK 5 items
Price
  1. $0.00 - $999.99 99 items
  2. $1,000.00 and above 1 item
Product Type
  1. AR-15 Barrel 90 items
  2. AR-15 Complete Upper Receiver 2 items
  3. AR-15 Partial Upper Receiver 5 items
  4. AR-15 Handguard 1 item
  5. Compensator 2 items
Rail Length
  1. 9.5" 1 item
  2. 9.55" 2 items
  3. 10.7" 1 item
  4. 11.7" 1 item
  5. 13.7" 1 item
  6. 15" 3 items
  7. 15.25" 1 item
Threaded
  1. Yes 7 items
Twist Rate
  1. 1:7 52 items
  2. 1:7.5 7 items
  3. 1:8 38 items
Stock Status
  1. In stock 100 items Remove This Item
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