The Midwest Industries Bolt Carrier Group for AR-15/M16 has a properly staked chrome lined gas key, shot peened bolt, and is Magnetic Particle Inspected and marked "MPI".

Features:

158 steel bolt
Shrouded firing pin
Phosphate finish

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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.