M16 Enhanced Nitrided Bolt Carrier and Key with Buffer Technology

Black Rifle Arms^® M16/AR15 Enhanced 6.5 Grendel Nitrided Bolt Carrier Group Patented Buffer Technology

We Set Out To Improve Upon Existing Bolt Carriers

BOLT CARRIER:

• BCG Weight: 10.76 oz.
• Bolt Carrier Material, 8620
• Key Material, 4130
• Bolt Carrier - Nitrided
• Standard Firing Pin
• Bolt body produced from AISI 9310 VAR (Vacuum Arc Remelt), the highest standard bolt material made
• Machined completely in one operation; this eliminates tolerance and repeatability issues that arise from the multiple fixturing processes used by other manufacturers
• Enhanced Design for utmost reliability
• Tightly controlled proprietary heat treat process to accurately control cast depth and core hardness
• Extractor produced from MIL-S-5000 steel and vacuum hardened
• NSCW Crane Division extractor upgraded with Viton® o-ring, 5 coil spring, and plunger
• Cam Pin, Melonite QPQ
• Firing Pin Retaining Pin 
• Standard Size Integrated Polymer Buffer:
• Eliminates metal on metal contact
• Eliminates contact between the hardened steel carrier, aluminum receiver extension and buffer
• Eliminates hardened steel carrier as it transitions between upper and lower receivers
• Self-lubricating, shock-absorbing and has seven times the abrasion resistance of carbon steel
• Reduction in felt recoil and vibration