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Taking the AR15 parts and accessories to new heightsTM
Rainier Arms, LLC

Rainier Arms AR-15 BCG - Phosphate

Rainier Arms BCG - Phosphate

Availability: In stock




The Rainier Arms BCG was created to meet and exceed all Mil Spec standards. The bolts are HPT MPI tested & Marked to give you ultimate confidence in your weapon system.


  • Full Auto Carrier
  • Heat Treated


  • Shot Peened
  • Heat Treated
  • C158


  • Stamped
  • Shot Peened
  • Heat Treated

Extractor Spring:

  • Chrome Silicone for Longer Life
  • Black Insert as per current Mil-Spec
  • "O" Ring is high temp resistant dark brown

Extractor Retaining Pin:

  • Precision Machined
  • Precision ground to diameter
  • Precision ground to length
  • Heat Treated

Firing Pin:

  • Machined and then precision ground for accuracy
  • Heat Treated

Gas Key Bolt:

  • Precision manufactured in house with extra deep knurling
  • Grade 8
  • 1200 degree locking patch is factory applied to threads to help insure long lasting tightness

Gas key:

  • Hard Chrome lined gas tube as per Mil-Spec
  • Bolts installed to proper torque
  • Staking on both sides of both bolts

Cam Pin:

  • Precision machined
  • Heat Treated

Firing Pin Retaining Pin:

  • Precision bent
  • Precision cut to length
  • Heat Treated

Gas Rings:

  • Stainless Steel per Mil-Spec


  • Precision machined
  • Heat Treated

Ejector Spring:

  • Chrome Silicone
  • Precision ground ends

Ejector Retaining Pin:

  • Precision cut to length
  • Hard Chrome Plated


Limited Lifetime Warranty
We are so confident in our Rainier Arms BCG we offer them with a limited lifetime warranty. So if at anytime your Rainier Arms BCG breaks on your during normal use(Intentional abuse & Gas Key wear not included) we will replace it.

Additional Info

Additional Info

Manufacturer Rainier Arms, LLC
Finish No
Barrel Length No
Caliber No
Configuration No
Option No
Gas Length No
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No


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