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The CMMG Replacement Barrel Kit, model 22D7C4A, is designed for dedicated .22 LR upper builds compatible with AR-15 and Mk4 platforms. It features a 16.1-inch barrel made from 4140 chromoly steel with a salt bath nitride finish and includes a barrel collar for installation.
This kit provides a durable and reliable solution for converting or building custom .22 LR AR-15 upper assemblies, ensuring dependable performance for recreational shooting or training.