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RSR Part #: CMMG55CA9CB Manufacturer Part #: 55CA9CB

CMMG, Receiver Extension Nut, Mk4


  • Precise Manufacturing
  • Long Term Reliability
  • Durable Construction

Product Description

High quality components and precise manufacturing make CMMG parts ideal for maintaining and upgrading firearms. The durability, reliability and excellent build quality of these parts will ensure years of service you can count on.