The K-Spec BCG is engineered to boost the reliability of your AR-15 platform, whether operating suppressed or unsuppressed and in any condition. Designed as a true plug and play solution, the K-Spec adapts seamlessly to various configurations, ensuring dependable performance no matter the mission.

Engineered for reliable performance in the most demanding conditions
Optimized for reliable performance in both suppressed and unsuppressed applications, across all uses and conditions
Dual ejectors for improved reliability and consistent ejection performance
Angled carrier rail cuts for reliable performance in adverse conditions and extended suppressed use
Downward gas ports for reduced gas blowback to the shooter
Fully auto profile
Permatex applied between the gas key and carrier mating surface for a secure and reliable seal
Carrier made from 8620 steel with outside rails, bolt runs and gas bores ground to .0002 tolerances, featuring an FDE PVD finish
Bolt made from 9310 steel with outside diameters ground to .0002 tolerances, MPI tested and finished with an FDE PVD coating
Firing pin made from 8740 steel, Swiss turned, heat-treated, precision ground and chrome-plated
Cam pin made from 4140 steel, Swiss turned, heat-treated with an FDE PVD finish and chrome lining for enhanced durability and corrosion-resistance
Extractor made from 4140 steel, fully machined for precision and phosphate-coated for enhanced durability and corrosion-resistance
Extractor pin made from S7 tool steel, precision ground and heat-treated for maximum strength and durability
Ejector made from S7 tool steel, precision ground and heat-treated
Gas key made from 4130 steel, heat-treated with an FDE PVD finish, secured with T25 Torx fasteners, torqued to spec and staked using a hydraulic staking machine for enhanced durability and performance

Report incorrect product description

Reviews

Q & A

Retail Stock

Compliance

Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

KAK Industry K-Spec Enhanced Bolt Carrier Group 5.56x45mm/.300 AAC Blackout, Flat Dark Earth