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CMMG Receiver Extension Kit with Enhanced Pistol Buffer Tube

  • The CMMG Receiver Etension Kit for AR Pistols comes with the CMMG Pistol Receiver Extension, Carbine Buffer Assembly, and Carbine Action Spring. Combine this kit with your choice of lower parts kit to complete your pistol lower group. 
  • 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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