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Midwest Industries AR15/M16 Bolt Carrier Group 5.56

  • The Midwest Industries AR15/M16 Bolt Carrier Group. Bolt is made of Carpenter No. 158 Steel and includes a shot peened. The Bolt Carrier is made of 8620 Steel.
    - Magnetic Particle Inspected and marked "MPI".
    - Hard Chrome Lined Carrier with phosphate finish.
    - Chrome Lined gas key, properly staked.
    - Black Extractor insert.
    - Shrouded firing pin.
    - Mil-Spec o-ring
    - Made in the USA
  • Item Specifications
  • The MSR Arms Advisor articles are intended to answer some of the most common shooter questions and assist our customers in making the best purchasing decision possible.
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  • No questions have been submitted regarding this product. If you have a question regarding this, or any of our other products, please submit them by emailing We will return your email promptly and post both the question and answer here for our other customers to view. Remember, there are no dumb questions... Thank you, MSR Arms

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