https://midstatefirearms.com/product/left-hand-nickel-boron-bcg-m16-ar15-bolt-carrier-group/

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One Complete Nickel Boron Full Auto Bolt Carrier Group.  This BCG is Suited for 5.56/223 & 300 Blackout. The nickel boron coating is excellent, extremely low friction and easy to clean.  Designed to eject left out of a Left-Handed Upper Receiver.

  • M16 Carrier-8620
  • Bolt-9310
  • MPI Tested
  • Upgraded Extractor Spring with o-ring
  • Properly staked gas key

Made in the USA by a quality manufacturer.