This guide details the comprehensive cleaning and maintenance of an AR-15/M-16 rifle, as demonstrated by a firearms expert. It covers disassembly of the upper and lower receivers, detailed cleaning of the bolt carrier group using both manual methods and an ultrasonic cleaner, and specific attention to critical components like the gas key and gas rings. The process concludes with reassembly and a function check, emphasizing practical techniques and the importance of proper lubrication.
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