NBS AR-15 .223/5.56 Bolt Carrier Group – Phosphate - $69.95 (Free S/H over $175)

Description

Description
The NBS5.56 Bolt Carrier Group for AR-15 rifles is made from high quality materials with quality assurance measures like high pressure testing and magnetic particle inspecting. The bolt assembly is machined from Carpenter 158 tool steel and tested to ensure it can withstand thousands of high-pressure rounds. The Carrier assembly is machined from 8620 steel and the entire BCG is magnetic particle inspected to ensure every dimension is as precise at can be. The Manganese Phosphate coating on this AR-15 bolt carrier group will increase in lubricity as it absorbs oil and combines with the natural lubricity of carbon to ensure your rifle will run reliably.
Features:
- Compatible with 5.56 NATO, .223, and .300 BLK
- M16 cut and full auto rated
- 8620 steel carrier
- Carpenter 158 tool steel bolt
- MPI and HPT
- Manganese Phosphate coating
- Properly staked gas key
- Chrome lined gas key and firing pin channel
- Shot peened bolt face
- Black O-ring extractor insert
MPN
51108
Bolt Material
9310 Steel
Cartridge Compatibility
.223/5.56 NATO/.300 BLK
Finish
Mag Phosphate
Carrier Profile
M16
Magnetic Particle Inspected
Magnetic Partical Inspected
Platform
AR-15
Bolt Finish
Mag Phosphate
SKU: 7835