Videos tagged with Gas Port Alignment

This expert guide details a comprehensive 'barrel autopsy' procedure, as demonstrated by the School of the American Rifle. It covers essential checks including thread concentricity, material identification, magnetic properties of the extension, erosion gauging, bore straightness, gas port alignment, and headspace verification using specialized gauges. A critical borescope inspection revealed a manufacturing defect: a smoothbore barrel lacking rifling, highlighting the importance of thorough inspection regardless of brand or price due to potential quality control lapses.

This video explains the critical importance of AR-15 gas block alignment for preventing malfunctions. It details how the oversized port in the gas block allows for some tolerance, but proper alignment is still key. The expert recommends dimpling only the rear set screw for consistent indexing across different barrel manufacturers.

This guide details the use of anti-seize compound to resolve barrel nut timing issues during firearm assembly, a common problem when components don't align correctly. Instruction comes from an expert at Brownells, emphasizing the compound's role in reducing friction and facilitating precise alignment of critical parts like sights and gas ports. The technique is applicable to various firearm types and also aids in future disassembly.