This video provides an in-depth review of the Cotton Arms adjustable gas block, highlighting its affordability and functionality for AR-15 and AR-10 platforms. The instructor details its construction from 4140 steel, its low-profile design, and the ease of side-mounted adjustment. He shares extensive real-world testing data, demonstrating how to tune the gas block for optimal cycling with various ammunition types, including steel-cased rounds, and discusses potential long-term maintenance concerns like carbon buildup.
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