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2A Armament Regulated Bolt Carrier RBC

  • The Regulated Bolt Carrier (RBC) is a lightweight carrier with a gas regulating gate built into the carrier itself. This provides a drop in, lightweight solution for those looking to tune your AR-15's gas system. It eliminates the need for adjustable gas blocks, and allows the firearm to be restored to a factory full weight system by simply swapping your full-mass carrier back into your firearm. The RBC has infinite adjustment from fully open, to fully closed on the regulating gate. The RBC can be tuned to most combinations of buffers, springs, suppressors, and barrel lengths. The RBC Is fully adjustable through the port door, and does not require the firearm to be broken down for adjustment! 
    • Carrier: 8620 steel, heat treated, QPQ Nitride
    • Bolt:  9310 steel, heat treated, MP, Cryo'd, QPQ Nitride
    • Rear body:  7075-T6, hard anodized clear
    • Extractor: machined, heat treated, QPQ Nitride
    • Carrier key: machined, heat treated, QPQ Nitride, staked screws
    • Regulating gate: machined from 6AL-4V Titanium
    • Weight: 7.9oz assembled
    • Requires customer supplied T-6 Torx tool for adjustment
    • Patent Pending
    • Product of the great state of Idaho, MADE IN THE U.S.A.
  • 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.
  • 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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