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