M16 AR-15 7.62x39 Enhanced Nitrided Bolt Carrier Group with Buffer Technology

Black Rifle Arms^® M16/AR15 Enhanced 7.62x39 Nitrided Bolt Carrier Group Patented Buffer Technology

We Set Out To Improve Upon Existing Bolt Carriers

The enhanced carrier's integrated buffer helps not only to eliminate metal on metal contact during the transition from upper to lower receivers, but it also buffers the impact between carrier and buffer. Comes with standard bolt carrier polymer buffer.

BOLT CARRIER:

• BCG Weight: 10.76 oz.
• Bolt Carrier Material, 8620
• Key Material, 4130
• Bolt Carrier - Nitrided
• Enhanced 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

• AR-15 bolt carriers are not compatible with AR47 or any rifle that takes AK Magazines.
• Bolt Carrier due to the polymer buffer is not compatible with folding stocks.  
• JP Silent Capture Spring is not compatible with our bolt carriers. In order to use JP Silent Capture Spring, the end-user would need to make modifications to the carrier's integrated buffer.
• Armaspec Stealth Recoil Spring is not compatible with our bolt carriers and bolt carrier polymer buffer can not be modified to work.
• Some off-the-shelf rifle cleaning solutions such as Hoppe's #9 can react negatively with NiB finishes. Since our carriers have nickel-based coating these should not be used on NiB/EXO coated products. Always refer to the manufacturer's recommendations before use on NiB/EXO coated products.
• Our Select Fire Customers have stated carrier bounce has been eliminated due to the polymer base buffer. We have run select-fire and have not experienced carrier bounce since the introduction of the integrated polymer base buffer. Patented buffer technology has been in use for 9 years with over 20,000 rounds without needing to replace the polymer buffer; however, if one damages the polymer buffer it is easily replaced.