raineirarms

Rainier Arms Precision Match Grade AR-15 .223/5.56 Bolt Carrier Group (BCG) - Nitride

Bolt Carrier Group

In stock

Limited Lifetime Warranty

We are so confident in our Rainier Arms BCG, we offer them with a limited lifetime warranty. If at any time, part of the Rainier Arms BCG breaks during normal use we will replace it for you. Intentional abuse is not covered by this warranty.

$169.95

The Rainier Arms Precision Match Grade BCG - 5.56 Nitride is machined and finished to a higher standard to meet and exceed all Mil Spec. It is machined using the most precise equipment in the industry. The bolts are MPI/HP tested & Marked to give you ultimate confidence in your weapon system.


Weight: 0.73 lbs. 


Carrier:

  • Full Auto Carrier
  • SAE 8620
  • Heat Treated
  • Nitride

 

Bolt:

  • 5.56/.223
  • Carpenter 158 Steel
  • Shot Peened
  • Heat Treated
  • Nitride

 

Extractor:

  • Machined from bar
  • Shot Peened
  • Heat Treated
  • Manganese Phosphate

 

Sprinco M4/AR-15 Extra Power 5-Coil Extractor Spring:

  • 5 coil design
  • Optimal for 16” or shorter rifles
  • For AR-15 BCG
  • Polymer inserts
  • Made from Chrome Silicon wire stock
  • Heat treated, stress relieved, and cryogenically processed

 

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: 

  • Staking on both sides of both bolts
  • Nitride

 

Cam Pin:

  • Precision machined
  • Heat Treated
  • Nitride

 

Firing Pin Retaining Pin:

  • Precision bent
  • Precision cut to length
  • Heat Treated

 

Gas Rings:

  • Stainless Steel per Mil-Spec

 

Ejector:

  • Precision machined
  • Heat Treated

 

Ejector Spring:

  • Chrome Silicone
  • Precision ground ends

 

Ejector Retaining Pin:

  • Precision cut to length
More Information
SKU RA-PMG-BCG-NITRIDE
Product Type Bolt Carrier Group
Manufacturer Rainier Arms, LLC

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